AMERICAN HYMENOPTERA. 31 



Ijyda pullata.— 9.— Dull black; clypeus, base of mandibles, arcuate 

 line on each side of vertex behind eyes, an elongate spot on each side within, 

 palpi, upper and lower lateral margin of prothorax, transverse triangular mark 

 at tip of anterior lobe of mesothorax, scutellum, spot behind, tegulae, dot on 

 aides of pleura posteriorly, tips of eoxse, trochanters, femora and tibiae, and 

 apical margin of ventral segments, white; antennae about twenty -jointed, 

 brown, basal joint black, third joint thrice longer than the fourth; wings 

 hyaline, nervures and stigma fuscous, second branchial cell with incom- 

 plete cross-line; tarsi ferruginous, anterior tibiae without side spur. Length 

 •35 inch. 



Hah, — Missouri, (C. V. Riley). 



Ii.yda perplexa. — 9- — Black; head coarsely punctured, the impressed 

 lines on vertex verj' deep ; clypeus, a slender slightly curved line extending 

 from summit of eyes to occiput, mandibles except lips, palpi, posterior angles 

 of prothorax, spot beneath, sublunate mark on middle of mesothorax anteriorly, 

 scutellum, spot on postscutellum, tegulae, legs entirely except base of coxae, and 

 most of venter, pale yellow; antennae short, black, about twenty-jointed, third 

 joint three times the length of fourth; wings hyaline, nervures fuscous, second 

 branchial cell with incomplete cross-nervure, third submarginal cell much 

 longer than second; anterior tibiae without side spur; abdomen tinged with 

 violaceous, an oblong orange-yellow patch occupying middle of segments 2 — 4; 

 base and apex of venter black. Length .35 inch. 



Hab. — Massachusetts, (Ridings). Closely allied to canadensis, and 

 looks very much like Burquei Prov., but differs in the form of the 

 antennae. 



Liyda fascipennis. — 9- — ^^"^1 black; head coarsely punctured, mandi- 

 bles yellow, shading to fulvous at tip; spot on sides of face, spot on apical 

 middle of clypeus, dot at summit of eyes, broad line on cheeks extending on to 

 occiput and two spots behind ocelli, ferruginous; palpi pale; antennae about 

 twenty-six-jointed, pale yellow, scape and apex of flagellum more or less dusky, 

 third joint more than twice the length of fourth; spot on sides of mesothorax, 

 one on scutellum and one on pectus in front of middle coxae, ferruginous; 

 mesothorax closely punctured, with anterior lobe and ferruginous space on 

 side lobes smooth; wings yellowish-hyaline, nervures yellow, stigma except 

 tip blackish, a fuscous band beneath stigma, slightly curved towards apex and 

 extending across the wing; second branchial cell with a mere rudiment of a 

 cross-nervure, third submarginal cell scarcely longer than second; legs black, 

 apex of femora, tibiae and tarsi yellow, anterior tibiae without side spur; 

 abdomen violaceous-black, segments 2 — 5 except spot or stain on middle, and 

 sides of segments one and six, yellowish-ferruginous. Length .60 inch. 

 Hah. — White Mountains, N. H., (Morrison). 



liyda seniidea. — 9- — Yellowish-brown or dull honey-yellow; head 

 around base of antennae and on vertex about ocelli varied with blackish- 

 brown; broad line on cheeks and two spots behind ocelli, yellow; antennae 

 long, slender, twenty-six to thirty-jointed, pale yellow, base fulvous, apex and 

 scape above blackish, third joint twice the length of the fourth; anterior 

 margin of mesothorax, and pectus, more or less black; a pale yellowish spot 

 oa sides of mesothorax posteriorly; wings hyaline, nervures fuscous; narrow 



