216 Say^s Descriptions of 



Length three tenths of an inch. 



A female has the hasal joint of the antennae almost 



black. 



3. A. apicialis. Black; antennae at tip white; ab- 

 domen honey-yellow. 



Inhabits Indiana. 



Body black : antenn^Ey four last joints white : nasus 

 profoundly lunate^ white : lalrum obtusely angulated 

 before, white : thorax^ with the posterior margin of the 

 collar and wing-scale, white : scutel white : wings hya- 

 line ; nervures black ; carpus white on the basal half: 

 abdomen honey-yellow : ftet honey-yellow : coxa, white. 



Length seven twentieths of an inch. 



The white terminal joints of the antennae strongly con- 

 trast with the remaining joints. 



4. A. epicera. Black; abdomen, base of the antennae 

 and feet honey-yellow. 



Inhabits Indiana. 



$Body somewhat slender, black: antennce^ 1st and 

 2d joints yellow, the latter two thirds the length of the 

 first ; 3d and 4th joints yellow on the upper side : nasus 

 deeply emarginate, yellow-white : lahrum suborbicular 

 and with the mouth whitish : mandibles piceous at tip : 

 thoraxj collar and wing-scale yellow : wings hyaline ; 

 nervures black ; carpal spot white on the basal half: 

 aJrfomen honey-yellow, basal segment black: feet honey- 

 yellow : coxa 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 : en- 



