Anteiiiiae rather sliort, lilifonu. liej^s short, tibiae willi knots of 
scales, posterior tibiae with long spurs. 
“ A very distinct genus, at first sight in appearance a 
Pterophorus of Section B. {Oxyptilns, Z.] But distin- 
guished from that genus by the fact that the. lower segment 
of the forevnng is cleft from half its length into two linear 
divergent subsegments and that the third segment of the 
hindxoing is only half the length of the second segment. 
Besides these points the abdomen is very thickset and finely 
pointed posteriorly; the antennae are unusually short, the 
legs short and stout and thickened with knots of very 
enlarged long scales at the roots of the strong, long spurs, 
as well as at the ends of all the tibiae.” 
Fig. 2. — Deiiterocopus tengstroeini. 
In Trans. Ent. Soc. Bond., 1880, p. 8, Mr. Meyrick 
diagnosed the genus Deiiterocoims as follows 
“ Forehead without tuft. Auteniiae in male—(?). Palpi moder¬ 
ate, ascending, 2nd joint with appressed scales, terminal joint 
moderate, acute. Tibiae thickened on origin of spurs with dense 
spreading whorls of scales ; posterior tarsi with similar smaller 
whorls on apex of two basal joints. Forewings trifid, cleft centrally 
from middle and lower segment cleft from two-thirds ; 2 and 4 
from point of angle of cell, 3 absent, 5 and 6 very short, 7 from 
below angle long, 8 and 9 long-stalked, 10 from near angle, 11 from 
near 10. Hindwings trifid, 3rd segment unusually short, terminating 
in a tuft of black scales ; 2 from middle of cell, 3 absent, 5 and 6 
very short, 7 to apex. 
“ I have examined D. tengstroeini, the only known 
species. The genus is derived from Plcdyptilia, and other¬ 
wise most nearly allied to Sphenarches.” It may be added 
that the species examined by Meyrick was evidently not 
tengstroeini, and that he was incorrect in giving as a 
generic character the absence of vein 3 of the forewing. 
