1864.] 675 



pubescence, more dense on the vertex ; the orbits, more or less narrow 

 and sometimes slightly interrupted at the summit and beneath, two ap- 

 proximate spots between the antennae, sometimes confluent and forming 

 a transverse mark, an elongate, more or less developed mark on the 

 disk of the clypeus, sometimes reduced to a mere line or dot and some- 

 times entirely wanting, and the mandibles, lemon-yellow ; clypeus large 

 and prominent, deeply emarginate at tip ; antennae short, about as long 

 as the width of the head, shaped and proportioned as in venpoides $ , 

 first joint above, and the third, yellow, the first joint beneath and the 

 second entirely, black, remaining joints pale ferruginous, except the 

 club above, which is more^ur less black, sometimes the antennae, ex- 

 cept the first and third joints, are almost entirely blackish above. 

 Thorax : broad anterior margin of the prothorax, its entire posterior 

 margin extending to the tegulae, a large spot on each side of the pleura, 

 the tegulae, a transverse, sublunate, more or less developed mark on the 

 seutellum, sometimes a transverse line behind the tegulse, and a spot 

 on each side of the metathorax covering the acute spiniform posterior 

 angles, all lemon-yellow. Wings more or less deeply tinged with yel- 

 lowish-fuscous, the broad apical margins paler, the tip of the marginal 

 cell more or less fuliginous ; nervures yellowish-ferruginous. Legs 

 lemon-yellow ; the coxae, trochanters and the basal two-thirds of the 

 femora, black ; sometimes the coxae are slightly yellowish at tips ; the 

 tibiae beneath and the tips of the tarsi more or less tinged with pale 

 ferruginous ; anterior tarsi pubescent, with the basal joint dilated ; the 

 shortest spur of the posterior tibiae suddenly tapering to the tip and 

 acutely cleft, the short prong very slender and somewhat hooked at 

 tip. Abdomen slightly sericeous ; all the segments above, except the 

 last, with a continuous, more or less broad, lemon-yellow band on the 

 apical margin, that on the basal segment slightly undulate or dentate 

 anteriorly, sometimes those on the fourth and fifth segments are more 

 or less deeply and squarely emarginate on each side anteriorly, and 

 occasionally the bands on the second and third segments are slightly 

 emarginate on each side anteriorly ; terminal segment mostly with a 

 rounded lemon-yellow spot on each side, sometimes confluent and form- 

 ing a broad band ; beneath, the second, third and fourth segments 

 have each a lemon-yellow band, sometimes interrupted into small une- 

 qual spots, and sometimes subobsolete. The general structure like that 



