O. A. Johannsen.
Sciara congregata, sp. nov. (Diptera).
Psyche 21:93, 1914.

Full text (searchable PDF, 80K)
Durable link: http://psyche.entclub.org/21/21-093.html

The following unprocessed text is extracted from the PDF file, and is likely to be both incomplete and full of errors. Please consult the PDF file for the complete article.

Johannsen-Scia~a congregata
SCIARA CONGREGATA SP. NOV. (DIPTERA).
BY 0, A. JOHANNSEN,
Cornell University, Ithaca, New York.
The following description is based on specimens reared at Fay- etteville, Arkansas, by Mr. George G. Becker, whose account of the habits of this insect appears in the present number of PSYCHE. Sciara congregata sp. nov.
Male: Length 2 mm. Head black, palpi and ?ntennz fuscous, the antenne rather short, about two thirds as long as the wing (measured from humeral cross vein), the intermediate joints not twice as long as wide. Mesonoturn subshining blackish; scutellum, metanotum, and pleura subopaque, brownish black. Abdo- men and hypopygium subopaque brownish black, the latter stout, with claspers resembling those of ~Yciu~ajucundu, though the apical set= are rather stouter. Cox= and legs brownish, the tarsi dark brown; legs relatively short and stout, hind tibia about as long as the petiole of the media of the wing; apical third of tibiz slightly broadened; hind tarsus about 0.8 as long as the tibia, hind metatarsus slightly over 0.7 as long as the following four joints. Wings smoky hyaline, veins dark brown, the radius, the forks of the media and the apical part of the forks of the cubitus beset with set=. RI ends two thirds as far proximad of the fork of the media as the tip of Rs is distad of this point; basal section of Rs very faint and indistinct, though the basal section of R is evidently noticeably longer than Rl; costa produced nearly 0.6 of the distanm from the tip of Rs to MI; Rs ends slightly proximad of Ms; , petiole of media very inconspicuous; cubitus forks distad of the base of the petiole of the media. Halteres dark. Femule: Length 2.5 mm. L&e the male in coloring and structure differing in having slightly shorter antenne, these being less than half as long as the wing, with intermediate joints but littlelonger than wide; the basal section of Rs and the petiole of the media a little more distinct. The lamelk of the ovipositor are only slightly longer than wide.
Type in my collection; paratypes in the collection of the Arkan- sas Agricultural Experiment Station. This species will find a place in the key given on page 118, Fungus Gnats of North America (Bull. Maine Agr. Exp. Station, No. 200), between 8. vkina and 8. dives, differing from both in coloring, venation, and structure of ~YPOPY!$U~.




================================================================================