AMERICAN LEPIDOPTERA. 5 



Family BOMBYCIDAE. 



Sub-fiimily Ceratocampidae. 



Tribe DRYOCAMPINI. 



PSEPHOPAECTES, n. g. 

 $ . Head, depressed, impacted on the prothoracic parts, which are 

 greatly advanced and projected above it. Eyes, very large and globose. 

 Clypeus, broad, triangulate. Antennae, slender, shorter than the tho- 

 rax, bi-pectinate at base for a third of their length, thence simple to 

 tips. Oral structure obsolete. Thorax, globose and elevated, half as 

 long as the abdomen, thus proportionate!}^ more elongated than in 

 Adelocephala. Abdomen, extending as far as internal margin of se- 

 condaries. Wings, rather narrow and elongated. 



Primaries, with the costa very straight, and but slightly depressed 

 before the acuminate apices. External margin scolloped, moderately 

 oblique. A shallow excavation below the tips, the margin rising to 

 disco-central interspace where it is produced, but is again and more 

 deeply excavate between first and third median nervule. At the ex- 

 tremity of this latter nervule, the wing is again produced, thence reced- 

 ing to internal angle, this latter rounded and improminent. The ner- 

 vules are straight or slightly arched. The diseal cell is narrow ; the 

 3rd sub-costal thrown off from the nervure itself and not from the dis- 

 eal cross-vein as in Adelocephala and Anisota, (Dri/ocmnpa., Harris). 

 The median nervure is straight, and its division into first and second 

 median uervules takes place at a point before the extremity of the dis- 

 eal cell, the second, proceeding straightly to the margin, while the first 

 is slightly arched, but not abruptly taking a divaricating course as in 

 allied genera. The diseal cell is closed, but the veinlet is weak, and 

 is, perhaps, not a true nervure. The third median nervule is thrown 

 off" from the nervure at a point about midway between the base of the 

 wing and the point at which the first and second nervules divaricate ; 

 it is directed downwards, but still slightly arched, and the space on 

 external margin between the nervules is wider than usual, owing more 

 particular to the arcuation of the first median nervule beyond the dis- 

 eal cell. Internal nervule, straight; the sub-median fold runs approxi- 

 mate to third median nervule. Secondaries, irregular in shape. The 

 costa is basiilly projected, thence depressed or cut away to the apices, 

 these latter rounded and full. The external margin is rounded ly pro- 

 duced superiorly, shallowly excavate between the median nervules, 

 ngain roundedly and shortly produced towards anal angle. Internal 



