54 BULLETIN 48, U^■ITl-:D STATES NATIONAL MUSEUM. 



of long black liair, capable of fanlike expausion. The tibia is uearly 

 all process, the epiphysis small, the outer shell covering a dense tuft 

 of blackish hair an<l scales, capable of loose brushy expansion, and 

 these scales extend beyond the chitinous structure and conceal the 

 remnant of the tarsus which is almost aborted. 



In the specimens examined of this species, the accessory cell of 

 primaries gives rise at its ti]> to 7 and a long stalk, from which arise 

 S, 1>, and 10. 



The structural differences between the two species referred here are 

 greater than in any other genus in the series, and withal the super 

 ficial resemblance is quite marked. 



Genus CHYTOLITA. Grote. 



1873. Grote, Trniis. Am. Entomological 8oc., IV, 309. 

 1873. Grote, Bull. Butf. Soc. Nat. Sci.. I, 39. 



JJcrmhvia. Gueuce. 

 1882. Smith, Bull. Bklu. Entomological Soc, V, 4. 



Eyes naked, moderate, globose. Front smooth, with a pointed tuft 

 l)etween the antennae. Antenna' long, inserted on the vertex, close 

 to the com|>ound eye. In the male the joints are marked, heavily 

 scaled, with long lateial bristles, and at basal third are two or 

 three joints that arc thickened and furnished with, each, a stout 

 corneous i)rocess, the third when present always smaller than the 

 others, and, in fact, merely a somewhat shorter and stouter lateral 

 bristle. In the female the joints are very slightly marked and are 

 burnished with small lateial bristles. The ocelli are prominent, set 

 close to the compound eye, moderately removed from the base of 

 the antennie. Palpi long, straightly projected forward or directed 

 obliquely upward, the second joint extremely long, the third short and 

 set in at an upward angle to the second. The second joint is clothed 

 with ui)right scales, forming a ridge or edge, or, as the Germans 

 render it, "schneidig beschuppt," and this scaly clothing is nearly 

 equal throughout, shortening only at extreme base. Body moderate, 

 untufted, abdomen smooth, cylindric, reaching to or slightly exceed- 

 ing the hind angle of secondaries. Legs long and moderately stout, 

 spurs of the middle and hind tibia^ long, unequal. Fore legs in the 

 male very much elongated and prominently tufted. The coxa is very 

 long and furnished with very long yellow hair, longest toward base, 

 forming a somewhat imperfect tuft. Trochanter comparatively short. 

 Femur stout, furnished at tip of upper side with a pencil of very long 

 yellow hair, capable of fan like expansion. Tibia aborted, the epiphy- 

 sis small, the jnocess well developed and covering the basal joint of 

 tarsi, concealing also a mass of specialized scales. The tarsi have the 

 basal joint very long, the others normal. In the female the fore legs 

 are normal. The wings are large, the primaries trigonate, with some- 

 what produced or rectangular apices and oblicjue, evenly curved outer 

 margin. 



