OF NATURAL HISTORY. 677 



with the posterior margin of the collar and wing-scale, white : 

 scutel white: wings hyaline; nervures black; carpus white on 

 the basal half: abdomen honey-yellow : feet honey-yellow : coxse 

 white. 



Length seven-twentieths of an inch. 



The white terminal joints of the antennae strongly contrast 

 with the remaining joints. 



4. A. EPICERA. — Black ; abdomen, base of the antennsE and 

 feet honey-yellow. 



Inhabits Indiana. 



% Body somewhat slender, black ; antennae, first and second 

 joints yellow, the latter two-thirds the length of the first; third 

 and fourth joints yellow on the upper side : nasus deeply emar- 

 ginate, yellow-white : labrum suborbicular and with the mouth 

 whitish : mandibles piceous at tip : thorax, collar and wing-scale 

 yellow : wings hyaline; nervures black; carpal spot white on the 

 basal half: abdomen honey -yellow, basal segment black: feet 

 honey -yellow : coxae white. 



Length less than three-tenths of an inch, 



Var. a. Scutel dull yellowish. 



5. A. CESTUS. — Black ; a white band at base of the tergum ; 

 pleura with a white spot. 



Inhabits United States. 



^Body black, with large crowded punctures : antenna, [217] 

 first and second joints yellow : nasus hardly emarginate with a 

 lateral whitish spot : thorax with the posterior margin of the 

 collar white : pleura with a white spot on the anterior upper 

 part : wings tinted with fuliginous ; nervures black ; carpal spot 

 wax-yellow : tergum with a dilated band extending to the lateral 

 sutures, white : feet white, a little varied with yellowish at tips 

 of the joints ; thighs black at base beneath. 



$Anal segment white : posterior coxae at base black : posterior 

 thighs in the middle and their tibiae at tip black. 



Length seven-twentieths of an inch. 



Kesembles the epinotus, but may be at once distinguished by 

 the white spot of the pleura. 

 1835.] 



