76 TRANSACTIONS OF THE [1890 



punctate, the clavus still more coarsely and roughly punctate 

 in longitudinal lines ; cuneus black, a little punctate ; membrane 

 piceous black. Venter highly polished, black, set with minute 

 bristles on posterior margin of the segments. 



Length to tip of venter, 5 millims. Width of base of prono- 

 tum, IJ millims. 



This insect closely resembles some of the black species in the 

 genus Prostemma I^at. of the family Nabidae. Two females 

 were examined from Los Angeles, collected by Mr. Coquillett. ■ 



Closterocoris. New genus. 



Long, sub-elliptical, with the head expanded beyond the 

 pronotum like a club or knob. Head sloping at angle of about 

 45 degrees, longer than wide, sub-conical as seen from above, a 

 little contracted behind the eyes, but not carinated, vertex regu- 

 larly widening anteriorly as far as the base of the antenna, 

 raised along the middle and with a slender impressed longitud- 

 inal line reaching to the base ; eyes ovate, prominent, placed 

 obliquely, a little emarginated inwardly, next the anterior end, 

 to receive the base of the antennae, tylus long, tapering towards 

 the tip, not acute, grooved each side above the middle ; jugum 

 triangular, a little tumid, longer than wide, gena prominent, 

 slender fusiform, bounded anteriorly by a carinate line ; rostrum 

 slender, curved, reaching to the posterior coxae, the basal joint 

 as long as the gula, abruptly expanded in width ; the second 

 joint reaching the tip of the anterior coxae, third and fourth 

 joints much shorter, nearly equal in length ; antennae nearly as 

 long as the entire body, filiform, the first joint longer than the 

 head, tapering towards the base, second joint as long as the 

 vertex and pronotum conjoined, the third hardly more than 

 half as long as the second, the fourth more slender than the 

 third and much shorter. Pronotum sub-campanuliform, with a 

 broad flat collum next the anterior margin, posterior surface 

 convex, with the margin arched and acute, sides sinuated, 

 rounded oif, destitute of a carina, pleural flaps sunken, the pos- 

 terior angles sub-acute, raised ; callosities obsolete. Scutellum 

 a little longer than wide, convex behind the base, acuminate at 

 tip, the base narrowly uncovered. Legs long, the posterior 



