12 AMERICAN ENTOMOLOGY. 



Lapiiria fulvicauda. — Specific character. Black, with 

 cinereous hair ; wings blackish ; tergum fulvous at tip. 



Laphria fulvicauda nobis, Journ. Acad. Nat. Sciences, vol. 

 iii. p. 53. 



Desc. Body black, with long cinereous hair : head large, trans- 

 verse ; eyes deep black : thorax varied with black and cinereous, 

 and with short, black hair; two distinct, longitudinal, dorsal, 

 black lines, with a more obvious cinereous band in the middle, 

 which is interrupted by the dorsal lines ; two cinereous obsolete 

 points each side behind : wings blackish : halteres pale at tip : 

 abdomen depressed, above and beneath subglabrous, hairy each 

 side ; the two terminal segments of the tergum with a common 

 fulvous spot. 



Length about three-fifths of an inch. 



Obs. I obtained it at the settlement of Cote sans Dessein, on 

 the Missouri river, during a short stay of Major Long's exploring 

 expedition at that place. 



Lower right figure. 



[This species has been called L. pyrrhacra by Wiedemann. — 

 Sacken.] 



Laphria sericea. — Specific character. Above with golden- 

 yellow hair ; thorax, beneath the hair, dark blue. 



Laphria sericea nobis, Journ. Acad. Nat. Sciences, vol. iii. p. 74. 



Desc. Head black ; hypostoma and gena with grayish hair, 

 that of the former tinged with dull yellowish ; vertex and occiput 

 with black hair : thorax dark blue, with golden-yellow hair, 

 rather longer* and somewhat more dense behind; a fringe of 

 longer black hairs over the insertion of the wings : pleura black- 

 ish ; a few long, pale hairs near the poisers : poisers pale : pectus 

 and feet black, hairy ; hair of the former long ; hair beneath the 

 anterior and intermediate feet whitish : scutel dull chestnut : 

 wings hyaline ; nervures fuscous, broadly but faintly margined 

 with yellowish-brown, as well as the inner edge : tergum dark 

 chestnut-blue, thickly covered by golden-yellow, silky hair : anus 

 black, naked : venter black-brown, nearly glabrous, with a few 

 whitish hairs, the segments pale on their posterior margins : ab- 

 domen cylindrical, depressed. 



Length four-fifths of an inch. 



06s. The nervures of the wings are arranged like those of 



