AMERICAN HTMENOPTERA. 27 



lijrda similaris. — 9' — Ferruginous or fusco- ferruginous, shining; spot 

 on sides of face, anterior margin of clypeus, base of mandibles and palpi, 

 yellow; a transverse black band on vertex nearly reaching the eyes, some- 

 times reduced to lateral spot ; antennse honey-yellow, extreme tip black, thirty- 

 two to thirty six-jointed, third joint more than twice the length of fourth; 

 spot on anterior margin of mesothorax and sutures of thorax narrowly, black ; 

 wings uniformly pale fuscous, with a brilliant golden gloss, second branchial 

 cell without cross-nervure, third submarginal cell not longer than second; 

 anterior tibiae with one side spur; extreme apex of abdomen more or less 

 dusky. Length .45 inch. 



Hah. — Nevada, (Morrison). This may prove to be a variety of 

 verticalis. 



I^yda jflorrisoni. — 9- — Yellow, or luteous-yellow; head above behind 

 ocelli varies from black to fulvous, with the usual two oblong spots and a 

 narrow line leading from summit of eyes to occiput, yellow; sometimes there 

 is only a square black spot behind ocelli, with the oblong yellow spot on each 

 side, and a spot behind each eye, pointed behind and reaching the occiput; 

 tips of mandibles black; antennse long, slender, pale at base, dusky at tips, 

 from thirty-six to thirty-nine-jointed, third joint nearly three times the length 

 of the fourth: thorax above more or less fulvous, sublunate spot on anterior 

 middle of mesothorax, posterior margin more or less, and scutellum luteous- 

 yellow; cordate spot on disk of mesothorax, middle of anterior margin, de- 

 pressed space on sides of scutellum, postscutellum except sometimes its tip, 

 and the metathorax above, black; sometimes the entire thorax is rufo- fulvous, 

 ■without any markings; middle of pectus varies from fulvous to black; wings 

 hyaline, more or less stained with yellowish, nervures fuscous, second branchial 

 cell without cross-nervure; tibiae and tarsi fulvous, anterior tibiae with one 

 side spur; abdomen above varies from fulvous-yellow to ferruginous, the basal 

 plates and first and sometimes the second segments above, generally more or 

 less black; venter luteous-yellow or fulvous. Length .55 — .60 inch. 



Hah. — Nevada, (Morrison). Allied to hrunnicans Norton. Quite 

 variable in color and markings. 



liyda atripes.— 9- — Dull black; cheeks, line behind eyes, two ovate 

 spots behind ocelli, all confluent with line on occiput, sides of face, confluent 

 with spot at summit of eyes, two spots behind base of antennse, clypeus, mandi- 

 bles except tips, palpi, posterior margin of prothorax, spot beneath, transverse 

 spot on mesothorax anteriorly, confluent with two spots behind, scutellum, 

 spot behind, large indented mark on pleura almost meeting on pectus, spot 

 above middle coxse, tegulse and all the coxse beneath more or less, white; 

 wings yellowish-hyaline, with a golden reflection, nervures fuscous, second 

 branchial cell without cross-nervure, third submarginal cell about as long as 

 second; antennse about thirty- four-jointed, testaceous, the scape and apical 

 half of flagellum black, third joint more than twice the length of fourth; legs 

 black, anterior tibise and tarsi dull testaceous, the former with one side spur, 

 base of femora with pale spots or lines; abdomen fulvo-ferruginous, basal 

 plates and apical segment black; ventral segments more or less black at base. 

 Length .50 inch. 



Hah. — North Carolina, (Morrison). 



