72 POMPILIDA. 
antenne inserted in the middle of the anterior part of the 
face, shorter than the thorax, slightly curved, filiform ; labrum 
concealed; clypeus porrect; mandibles arcuate, bidentate.* 
TuHorax somewhat gibbous; collar transverse; scutellum 
minute, placed below the mesothorax; metathorax obtuse ; 
superior nings nith one marginal cell—small, subtriangular, and 
two submarginal cells, the first long, the second subquadrate, 
slightly contracted towards the marginal cell, receiving both re- 
current nervures—the commencement of a third slightly traced ; 
the legs long, the posterior pair in particular; the anterior 
tarsi of the ¢ ciliated on the outside; and all the t2bie armed 
with spines, the posterior ones with a double row; the bifid 
clams furnished with a small pulvillus placed between them. 
ABDOMEN ovate, subsessile. 
Type, A. unicolor. 
+47 This genus was established by Spinola in 1808; it 
was adopted by Latreille, in his ‘“‘ Genera,” in 1809. It 
closely resembles Pompilus in habit, particularly the P. 
gibbus. 
Spr. 1. Brcotor. Spin. 
ater, abdominis segmentis tribus anterioribus saturate rubris. 
length 23—3} lines. 
Spinola, 2. 34 ; Lat. Gen. 4. 64; St. Fargeau, Ency. Méth. 10. 183. 
1; V.d. L. Obs. pt. 1. 80. 3. 
Head black, punctured, with a slight silvery pubescence 
covering the face, excepting the clypeus,. 
Thorax black, punctured; the wings fuscous, the extremity 
having a broad black border extending inwards nearly as far as 
the apex of the second submarginal cell; the legs black. 
* Spinola says tridentate, but St. Fargeau bidentate. Not having a specimen 
1 am unable to say which is right, but I conclude the latter, as he corrects 
Spinola. 
