230 BULLETIN 45, UMTF.D STATES NATIONAL MUSEriM. 



ocelli .3, tiiangaliiily aiTatij;e(l, the lateral coutiguous to the eye; eyea 

 larjje, oval, usually bare, sometimes pubescent. 



Antenuje inserted close to the mouth, 12-Jointed in both sexes, in 9 

 clavate, the club G-jointed, in S tiliform, jmbescent. 



Maxillary palpi short, 4-joiuted ; labial palpi 3 jointed. 



Mandibles bidentate. 



Thorax oval, truncate anteriorly,- the anjjles of the prothorax alone 

 visible from above; mesonotum much wider than long, without furrows; 

 scutellum rather large, semicircular, convex; metathorax very short, 

 abrupt. 



Front wings with the submarginal vein attaining the costa at about 

 half the length of the wing, or a little before; marginal vein variable, 

 punctiform, or rarely more than half the length of the stigmal, the latter 

 rather long, oblique. 



Abdomen broadly oval, sessile, carinated along the sides, the second 

 segment the largest, the first and third about equal. 



Legs with the femora and tibiie subclavate, the tibial spurs 1,1,1, 

 distinct, the tarsi long, slender, the basal joint of hind tarsi about thrice 

 as long as the second. 



This genus closely resembles TeJenornvs and could only be confused 

 with it, for, like that genus, it is found parasitic in the eggs of various 

 Hemiptera. It is, however, readily distinguished by the distinctly 

 carinated abdomen, the 12-jointed antennae in the females, the coarser 

 sculpture, and the more sessile abdomen. > 



It occurs in all parts of the world and is particularly well represented 

 in the South American and West Indian faunas, where no doubt it does 

 good service in diminishing the number of Hemiptera to be found there. 



The several species found in the United States may be readily sepa- 

 rated by the aid of the following table: ' ;^ 



TABLE OF SPECIES. Ti" ' 



Species very coarsely rngoso-pnnctate 2 



Species smooth, at the most faintly jiunctate or shiigieeiied, sericeous. 

 Coxte black or dusky, legs yellow, or pale hrowuish-yellow. 

 Head and thorax shagreened, the scutellum finely punctate. 

 Abdomen polished, the first and second segments faintly longitudinally 

 aciculated, the second, without a row of punctures at base. 



H. LA.RGI, sp. nov. 

 Head distinctly punctate, the thorax faintly punctate. 

 Abdomen closely, finely punctate, the basal and apical edges of all the seg- 

 ments smooth, polished, the first segment striate at base, the second 



with a row of striate punctures at base H. leptocokis.e How. 



Head and thorax closely, finely punotulate, opaque. 

 Abdomen smoother, shining toward apex, the first and second segment stri- 

 ated H. MY'RMECOl'HILUS, Sp. nOV. 



2. CoxiP and legs brownish-yellow. 



Abdomen with coarse, longitudinal cribrate rugosities on all the segments, 

 smooth and polished along the sutures H. Ruaosus How. 



