54 S. W. WILLISTON, M. D. 



slender, a little broader at the base, not flattened or expanded distally, shining 

 bluish black ; the venter, sides, and posterior angles above, not reaching quite 

 across behind on the posterior segments, white pollinose like the thorax : hypo- 

 pygium thickened, of moderate size, white pollinose. Legs black, rather thinly 

 clothed with white pile and bristles, hind tibiae rather stout, in structure like 

 those of Nicocles scitulus Will. Wings hyaline, faintly yellowish tinged on outer 

 half, first longitudinal vein and costa, beyond the tip of auxiliary vein, a little 

 thickened. 



One specimen, Arizona (Prof. Conistock). I see no reason why this 

 species should not be placed in this genus. I would also place Taracticus 

 hrevicornis and Nicocles scitulus of my previous paper in this same genus, 

 and I doubt very much the expediency of separating Blacodts hellus 

 Loew. 



L.APIIR1N.E. 



I.4PIIRIA. 



The following table includes only such species as are known to me. 

 Lampria felis is included, as the femora below do not show the tubercles 

 characteristic of that genus. 



1.— Legs wholly black 2. 



Legs not^wholly black 10. 



2. — Wholly black pilose, except on dorsum of abdomen, where it is dense and 



bright red , aiifhrax Will. 



Head and thorax not wholly black pilose 3. 



3. — Dorsum of abdomen with a large, elongate, red-pilose, red spot: facial gib- 

 bosity large, hemispherical gilva Linn^. 



Abdomen without such spot; facial gibbosity not unusually large 4. 



4. — Head clothed wholly with reddish pile and hair; venter black. .vulfur 0. S. 



Head with more or less black hair or pile 5. 



6. — Face with abundant long yellowish white pile more or less concealing the 



small gibbosity 6. 



Facial gibbosity conspicuous, the light colored pile confined to the sides 



above 7. 



6. — Abdomen wholly black vivax Will. 



Venter, and posterior angles of the segments above, red. 



Tentralis n. sp. 



7. — Abdomen nearly bare 9. 



Abdomen with conspicuous light colored pile 8. 



8. — Face with yellow pile, beard yellow fero.X Will. 



Pile of face above and the beard white sericeiis Say. 



9. — Dorsum of the thorax in the male with light yellow, in the female wholly 



black pubescence and pile franciscana Big. 



Dorsum in both sexes with sparse white pubescence; eastern species. 



can is Will. 

 10. — Head, margin of the thorax, and the abdomen with thick yellow pile. 



saffrana Fabr. 

 Thorax without such pile; smaller, nearly bare species 11. 



