312 ENTOMOLOGICAL SOCIETY 



ond. Antennae extending to the middle of the wing, or a little 

 beyond, simple in the female, joints somewhat marked, and with 

 little tufts of short hair in the males. Tongue short, yet corne 

 ous ; spiral and, perhaps, functional ; but I doubt it. Thorax 

 comparatively small, quadrate, with long, flattened hairy vesti- 

 ture, forming no obvious tufts, yet fairly defining the patagia ; 

 the collar, however, is not relieved. Legs comparatively short, 

 rather stout, middle and hind legs subequal ; the former with 

 longer femora, the latter with longer tibiae. The vestiture varies 

 somewhat in the species, but never forms specialized tuftings. 

 Tibiae unarmed save for the usual spurs, and not spinulated. 

 Tarsi tending to taper toward tip, spinulation only moderate, the 

 claws concealed by the vestiture. Abdomen very long, exceed 

 ing the angle of secondaries by nearly or quite half its length" ; 

 very stout and cylindrical in the female, not much narrowed in 

 the male ; in both sexes with a terminal tuft. Primaries varying 

 somewhat in proportion to the thorax, but always seem short and 

 stumpy in proportion to the abdomen ; the costa is a little arched, 

 the inner margin subparallel, outer margin forming an appproxi- 

 mate rectangle at apex, thence obliquely rounded to a very obtuse 

 hind angle. Secondaries proportionate. The venation offers 

 nothing characteristic or different from the normal. On the pri 

 maries there is a little 'variation in the origin of veins y 10 ; in 

 subjliva 7, 8 and 9 arise together from the end of the accessory 

 cell, and 10 comes from the middle of the upper margin; in 

 cblongu 7 and 9 are from the end of the accessory cell, while 8 

 is out of 9 halfway to the apex, 10 being a little nearer the apex 

 of the accessory cell ; in Iceta the venation is as in oblonga} in 

 alamcda veins 7, 8, and 9 arise close together from the end of the 

 accessory cell, but 8 and 9 are on a very short stalk and 10 is 

 from the outer third of the cell. Cn the secondaries vein 5 is 

 practically obsolete except in alameda, where it is quite obvious, 

 but much weaker than the others. The studies on venation were 

 made primarily on wings mounted in balsam, supplemented by 

 examinations of other specimens from different localities. Very 

 little variation is indicated, yet veins 7 to 9 of the primaries are 

 those that are most subject to variation, and it is quite likely that 

 there may be some divergence from the characters given here. 



One of the most characteristic features of this genus is the pecu 

 liar structure of the female genitalia, which was figured and 

 described by Dr. D. S. Kellicott for his subcarnea.* Seen from 

 behind, there is the highly chitinized rim of an abdominal seg 

 ment which covers a broad triangular upper sclerite ; this sclerite 

 has thickened edges which, as they extend backward, separate into 

 two flattened lobes which turn downward and in part cover the 



*Bull. Buff. Soc. Nat. Sci., v, 1885. 



