85 







and all the other species which I have seen, except molitor, live 

 in rotten trees. 



No. 292, badius Say. 



No. 429, reflexus Say. 



No. 903, interstitialis Say. 



No. 715, Tenebrio? [= " Uloma fodiens Germ., teste Hentz," 

 Harr. MSS. Catal.] blackish-brown, polished, head with a trans- 

 verse, broad impression, antennae hairy; thorax distinctly 

 punctured ; elytra punctato-striate, interstitial lines convex, 

 sublsevigated ; anterior and intermediate tibiae denticulated on 

 the external edges. Male with a broad, transverse depression 

 on the thorax near its tip. Length from .40 in. to .45 in. ; 

 breadth from .16 in. to .19 in. This insect resembles badius ^ 

 but the foveolate head and thorax and denticulated tibia3 suffi- 

 ciently distinguish it. Probably it does not really belong to 

 the genus Tenebrio. 



In answer to your queries for a diagnostic between the sexes 

 of the ApidoB and Vespidce, I can tell you but little more than 

 you will find in Kirby and Spence, III, pp. 301347. In the 

 male the antennae are generally longer and have more joints 

 than in the female. The eyes of the male are often very large, 

 and nearly meet on the top of the head, which, however, is 

 smaller than that of the female ; Apis and Xylocopa are exam- 

 ples. The male Polistes fuscata may always be known from 

 the female and neuter by its white face. In some genera, as 

 Tracliusa Jurine, *Megachile, Ccelioxys, the anus of the male is 

 bifid, and of the female acuminate. In other genera this part 

 is obtuse in the male and acuminate in the female. 



HARRIS TO HENTZ. 



MILTON, Oct. 24, 1829. 



My Cistela sulphurea? Fabr., I believe to be identical with 

 C. sericea Say, Journ. Acad., but not the same as C. sericea 

 Say, Long's Exped. These two species of Professor Say I 



