Edmund H. Gibson and Abby Holdridge.
The Genus Narnia Stal, and a Key to the Genera of Anisoscelini A. and S. (Coreidæ: Heteroptera).
Psyche 25:1-3, 1918.

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PSYCHE
VOL. XXV FEBRUARY, 1918 No. 1
THE GENUS NARNIA STAL, AND A KEY TO THE
GENERA OF ANISOSCELINI A. AND S. (COREIDB: HETEEOPTERA).
BY EDMUND H. GIBBON and ABBY HOLDRIDGE,
Bureau of Entomology, Washington, D. C.
Members of the genus Narnia Stal present an interesting group in the tribe Anisoscelini A. and S. as well as presenting difficulties to the systematist. In 1862 Stal described the genus to include his femorata and later, in 1870, he described N. pallidicornis, both descriptions being made from single specimens. Since then three other well defined species have been added to the genus. Now, from the study of a large series of specimens it appears that Stal's two species are the same and one species, with the name femorata retained. The characters which he gives for separating pall&- cornis from femorata can not be termed stable, such as the color of the basal joint of the antennae, which varies to a considerable de- gree in nearly every species of the tribe. The late Mr. Otto Heidemann was of the same opinion as the present authors in this matter. Mr. E. P. Van Duzee, Entomological News, Vol. XVII, No. 10, pp. 384, 1906, has also voiced a similar belief when he stated that he suspected femorata to be a northern form of pdid- icornis.
Mr. Van Duzee considers his species snowi and wilsoni as form- ing a subgenus to which he gives the name Xerocoris. In this respect the authors disagree with Mr. Van Duzee and state that if there is to be any dividing of the genus it should be so as to group femmata and snowi together and inornata and wilsoni together. Such a grouping would be based upon the form of the dilation of the hind tibiffi which is quite generally accepted to be of greater importance than the relative breadth of insect and con- nexium, and form of prothorax. It seems quite unnecessary to recognize subgenera in Narnia.




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2 Psyche [February
Narnia Stal.
Narnia Stal, Stett. Ent. Zeit., Vol. 23, p. 294 (1862). Head elongate, horizontal. Antennae rather stout but not swollen or dilated, basal joint short, shorter than length of head; rostrum passing the metasternum, bucculae short. Thorax longer than head, broad and rounding posteriorly. Elytra nar- rowing towards apex. Hind femora more or less swollen, hind tibiae with small dilations or foliations. Narnia may be separated from Leptoglossus by the smaller dilation of the hind tibiae and shorter basal joint of antennae.
Key to the Species.
..
1. Dilation of hind tibia reaches two-thirds the length of tibia. .2
Dilation of hind tibia reaches three-fourths the length of tibia. .3 2. Elytra with distinct, broad, white band; width comparatively great. .................................... snowi Van D. Elytra without distinct white band, sometimes a slight trace of one; width comparatively narrow.. .......... femorata Stal 3. Species small, apex of head, basal joint of antennae, and legs red. ................................... .wilsoni Van D. ....
Species larger, no distinct red colorations. .inornata Dist.
Narnia femorata Stal.
Narnia femorata Stal, Stett. Ent. Zeit., Vol. 23, p. 296 (1862). Narnia pallidicornis Stal, Enum., I, p. 166 (1870). This species can be distinguished from all others by the short stout dilation on the hind tibiae and without band across elytra. The species occurs in California, Arizona, Texas, Mexico and Guatemala.
Narnia snowi Van D.
Narnia snowi Van Duzee, Ent. News, Vol. XVII, No. 10, p. 384 (1906).
The distinct broad white band across the elytra and broader form will readily distinguish this species from femorata Stal. It is recorded from California, Arizona and New Mexico. Narnia inornata Dist.
Narnia inornata Distant, Biol. Cent. Amer., Vol. I (1880-93). This species may be readily distinguished by the long slender dilations of the hind tibiae, and lack of reddish colorations. This western species occurs in Arizona, California and Mexico.



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Gibson and Holdridge-The Genus Narnia Stal Narnia wilsoni Van D.
Narnia wilsoni Van Duzee, Ent. News, Vol. XVII, No. 10, p.
384 (1906).
Wilsoni differs from all other species in that it is much smaller, and has red colorations on apex of head, basal joint of antennae, and legs.
This species occurs in California.
A Key to the Genera of Anisoscelini A. and S. The following key includes all of the genera of the tribe Ani- soscelini A. and S.
Representatives of but three of the genera, Chrondrocera Lap., Leptoglossus Guer. and Narnia Stal occur in American north of Mexico, the other genera being limited to Cen- tral and South America.
The tribe may be characterized as follows: Head elongate, antennae long and more or less slender. Thorax trapezoidal in form, greatly depressed anteriorly, posterior lateral angles more or less acutely angled. Posterior femora sometimes swollen but not incrassated. Posterior tibiae with a broad thin dilation or fo- liation which is often wider than the width across the elytra. The genera may be considered as grouped into two divisions, Anisoscelaria n. n. those having the joints of the antennae simple as in Anisoscelis and Chrondroceraria n. n. those having the joints of the antennae more or less dilated as in Chrondrocera, The authors feel justified in placing Stenoscelidea within this tribe as the characters of the hind tibiae are of greater importance than the form of the antennae.
1. First joint of the antennae much longer than the second Uranocmis Walk.
First segment of the antennae not longer than the second, often ......................................
much shorter. .2
...............
2. Segments of antennae prominently dilated. .8 .......................
Segments of antennae not dilated. .3
3. Basal joint of antennae short, shorter than length of head Narnia Stal
Basal joint of antennae long, as long or longer than length of ............................................ head.. 4
4. Basal joint of antennae equal to length of head, or slightly ..............................
longer. Leptoglossus Gu6r.
Basal joint of antennae very much longer than length of head, 5



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