F. G. Carnochan.
Two New Species of Hister.
Psyche 22:144-145, 1915.

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Psyche
[August
TWO NEW SPECIES OF HISTER.
Hister solaris sp. nov.
Oval, shining, about the size of Hider furfiru8. Head punctate with frontal
stria semicircular, deeply impressed, not reentrant, Pronotum punctate, external
and internal strize entire, gradually approaching at base, and between them con- fused stri~ usually extending past the middle. Margin of thorax ciliate. Three entire dorsal stri~, the fourth basal, with a faintly defined apical appendix, the fifth apical, faintly defined; the sutural apical, sometimes extending as far as the middle; outer subhumeral a short mark in the basal third, faintly impressed or absent, inner subhumeral visible as a short stria apically, or reduced to a few shallow punctures, which are barely discernible. Elytra red with trapezoidal black spot and black posterior margins; inflexed portion of elytra red, shading to brown at extreme edge. Anterior femora brownish, bidentate, middle and hind femora red, tipped with black at each end. Length (from base of thorax to apex of elytral suture) 3.5 mm.
This species is closely related to urcuatus, differing from it only in color, which in a~cuatus is mahogany and black, while in this species in orange-red and black, and in the distribution of the color. Arcuatus has the mahogany spot surrounded with black, the in- flexed flanks being black, This species has the inflexed flanks orange-red.
A~cuutus is slightly larger and more robust. Described from six specimens; two from Wenatchee, Washing- ton, May 8,1908 (W. M. Mann); one from Wawawai, Washington, April 24, 1909 (W. &I. Mann); one from Corvallis, Oregon, April 20, 1910 (sent to me by C, A. Frost); two in the collection of the American Museum of Natural History from Douglas, Wyoming, and Nevada. The type from Wenatchee, is in my collection; the others are in the collections of Mann, Frost and the American Museum.
Hister edne sp. no^.
Oval, black, shining, about the size of Hisfer sedecim~tgatus. Head with a few
indistinct punctures, frontal stria semicircular, entire, not reentrant. Prothorax
bistriate; the outer stria entire, slightly sinuate; the inner also entire, slightly sinuate, closer to the outer at the base than at the apex, and slightly hooked inward at the base; sparsely punctate laterally inside inner stria for one-half the length of stria from base, also with a finely punctate area in front of the scutellum. Elytra
1 Contributions from the Entomological Laboratory of the Bussey Institution, Harvard Uni- vers:ty, No. 100.




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191 51 Carnochan-Two New Spea'es oj Hister 145 with five deeply impressed stri~? the fourth very slightly abbreviated at base; the fifth arching at base and joining the sutural; oblique humeral finely impressed; subhumeral subentire, not quite attaining the base? deeply impressed; the inner subhumeral represented by a series of distant punctures in the apical half. Pro- pygidium bordered by fine, dense punctures, inside of which are very coarse punc- tures which become more widely separated towards the center and apex, which is nearly smooth. Pygidium much more finely and densely punctate, the punctures becoming more sparse at the apex. Prosternal lobe margined. Mesosternum subtruncate, with in entire marginal stria which is deeply impressed. Anterior
tibize five-dentate; the four lower teeth large and distinct, the upper tooth reduced to a small denticle; the first tooth not bifid. Length (from base of thorax to apex
of elytral suture) '2 mm.
'
This well-marked species can not be assigned to any of Horn's groups.
In general appearance and elytral striation it closely resembles sedecimstriai!~~, but the single subhumeral, the presence of two entire thoracic strize, and the slightly emarginate meso- sternum prevent its being placed in the americanus group; it can- not be placed in the servus group to which its mesosternum would lead because of the entire subhumeral, the five entire dorsal stri~ and the five-dentate tibiz, nor can it be placed in the merdarius group because of the completeness of the elytral pattern. It should be placed as a connecting link between the seruus and the americanus groups.
Described from two specimens collected at Southern Pines, North Carolina, March 19, 191%
(A. H. Manee). The type is
in my collection.




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