118 NORTH AMEIUCAX NYSSONIDAE (hYMENOPTERa) 



browTi spot occupies the marginal, second submarginal and most of the third 

 pubmarginal cells and extends vaguely toward the wing apex. Length, 

 8 mm. 



Eyes strongly converging, the width of the face about equal to the length 

 of the scape; clyi)eus swollen, it and the yellow portions of the face and front 

 scarcely punctate; the rest of front and vertex strongly but sparsely punctate; 

 third segment of antennae little longer than the fourth, fourth to twelfth 

 with more or less carinate lobes beneath, the ninth with a spine-like process, 

 the tenth widened, the eleventh and twelfth with cicatrices beneath. 



Mesonotum strongly and evenly but sparsely punctate; scutellum and 

 postscutcllum polished, with sparse punctures; mesopleura polished and 

 shining, evenly but sparsely punctured, epicnemial area pronounced and 

 forming almost a right angle with the mesopleura and mesosternum from 

 both of which it is separated by a strong carina, as also the two latter from 

 each other; ba.sal triangular area of propodeum ill-defined and much obscured 

 by vestiture, but striate; posterior surface closely, towards the sides more 

 sparsely, coar-sely punctate; lateral surfaces polished, sparsely punctate. 



Dorsal and .second ventral segments rather coarsely punctured; the second 

 ventral not produced; the fifth with a lateral oblique process, as in confertus, 

 but the inner edge thereof sloping and not hooked as in that species; third 

 to sixth ventral segments inclusive with cons))icuous silky pile. 



Habitat. — California: Brawley, Imperial County, August 9, 

 1914, two males, (the author). 



Types. — Holotype, cf, Cornell University no. 143.1; paratype, 

 &, no. 143.2. 



This species may be distinguished from all others except con- 

 fertus by the presence of laminae on the fifth ventral segment. 

 From conjertus it may be distinguished as follows: 

 Twelfth segment of the antennae with a carinate tubercle beneath; lamina 



of fifth ventral segment not so high and rounded, not hamate behind; 



abdomen closely and coarsely punctate, prothorax except dorsally, hind 



and middle coxae and first and second ventral segments, rufous. 



imperialensis new species 

 Twelfth antennal segment simple; lamina of fifth ventral segment hamate 



behind; abdomen more sparsely i)unctate; prothorax, coxae and venter, 



entirely black confertus Fox 



Gorytes (Hoplisoides) insolitus Fox 



("amkouma: Ciareniont, two males, (C. F. Baker), [Pomona College and 

 Cornell University]. 



These differ in color from the types as follows: first dorsal, 

 first antl second ventral, second and third dorsal laterally rufous 

 except wlicre inmkcd with yellow; tliiid veiilral also soniewhnt 

 rcfldish; liind fcinoi;! luFous (^xc(>pt at base. 



