806 CHARLES PAUL ALEXANDER 



row on segment 7, a darkened, transversely rectangular area bearing setiferous punctures 

 in two broken rows, the posterior row the more complete; posterior rings of other segments 

 of dorsum bearing setae in somewhat the same arrangement. Pleural area pale, segments 

 2 to 8 with a long, delicate seta on each annulus. Dorsum of segment 8 (Plate XXII, 70) with 

 a large setiferous tubercle on either side, this tubercle densely covered with hairs that are 

 longest behind and shorter in front; caudad of these large, blunt knobs, a slender, setiferous 

 tubercle. Last segment with tergal valves chitinized, elongate, extreme posterior margin 

 rounded medially and feebly bilobed, lateral angles produced caudad and dorsad into power- 

 ful curved, heavily chitinized hooks; a few setae at about midlength of these hooks 

 (Plate XX, 62). Sternal valves shorter, slightly bilobed medially. 



Nepionotype. Ithaca, New York, June 4, 1917. 



Neanotype. With the nepionotype. 



Paratypes Topotypic, May 1 to June 10, 1917. 



Subtribe Ellipteraria 



The present knowledge of the immature stages of the genus Elliptera 

 is due entirely to the work of Mik (1886 b). From his rather detailed 

 description and figures, it certainly appears that the group should receive 

 coordinate rank with Antocharia, Limnobaria, and other divisions herein 

 created. The genus Elliptera shows peculiarities of structure in all stages, 

 but many features of its organization remind one forcibly of species of 

 Dicranomyia (such as D. simulans and D. trinotata) on the one hand, and 

 of Antocha on the other; and it may be that the genus Elliptera stands in 

 closer relationship to Dicranomyia than is now believed. 



Genus Elliptera Schiner (Gr. I omit, or ellipse + wing) 



1863 Elliptera Schin. Wien. Ent. Monatschr., vol. 7, p. 222. 



1913 Ellipoptera Bergr. Ann. Mag. Nat. Hist., 8th ser., vol. 11, p. 576 (correct 

 spelling). 



Elliptera is a small genus, including but five species which have a dis- 

 continuous range, two being found in Europe and three in western North 

 America. The commonest of the North American species, E. clausa 

 O. S., was found on wet moss in the spray of Vernal Falls, Yosemite Valley, 

 California (Osten Sacken, 1877:198). The only information available on 

 the immature stages of a member of this genus is that furnished by Mik 

 (1886b) on the European species E. omissa Egg. (quoted subsequently 

 by Griinberg, 1910:31-32, and by Malloch, 191 5-17 b: 226-227). The 

 description and account as given below are based entirely on Mik's 

 paper. 



