350 APPENDIX. 



particularly towards the tip; tibia remarkably dilated, 

 forming a rectangular triangle, much compressed, except- 

 ing at the inner tip, and undulated on the inner side, first 

 joint of the tarsus elongated, much longer than the tibia, 

 not dilated, densely ciliated on the inner side with equal, 

 fulvous hair; venter s^tarsely hairy ; fourth segment divided 

 by a longitudinal suture in the middle, at the posterior an- 

 gles prominent, acute ; fifth segment short, longitudinally 

 carinated in the middle, and with a prominent tubercle 

 each side behind ; sixth segment longitudinally divided in 

 the middle by a suture. 



Length seven-tenths of an inch. 



This singular insect does not perfectly correspond in 

 character with the genus under which I have placed it, and 

 it disagrees still more with the neighbouring genera as de- 

 fined in the books. 



PANURGUS, Pa7iz. 



P. S-maculatits. Black ; tergum with four, transverse, 

 yellow spots on each side. 



Inhabits United States. 



% Hypostoma, labrwni, mandibles at base, inferior part 

 of the anterior orbits, yellow ; antennae brown, yellowish 

 beneath and bright yellow on the anterior side of the basal 

 joint ; thorax slightly tinged with brassy, a small yellow 

 point each side on the collar ; pleura with a yellow spot 

 before the wings ; wings slightly dusky, pale at base, ner- 

 vures fuscous ; feet yellow, middle of the thighs and pos- 

 terior middle of the tibiae blackish ; posterior feet blackish- 

 brown, knees and base of the thighs yellow j tergum dark- 

 brown, four first segments each with a transverse, yellow 

 spot. 



