176 . E. T. CRESSON. 



legs are sometimes more or less varied with black ; the antenn£B have 

 a yellowish annulus in both sexes, sometimes indistinct; coxal scopa 9 

 distinct. Length S 9 .40 — .50 inch. 



This may be the Joppa ferrugator (Fabr.) Brulle, Hym. p. 295. 



150. difficilis, Cress. Proc. Cal. Acad. 1877. 



Ilab. — Van., Cal. A ferruginous species, with head, antennae, 

 thorax more or less, coxae, tips of posterior tibiae and basal margin of 

 abdominal segments three to five, black; face yellow; wings dusky; 

 mesothorax, scutellum and metathorax more or less ferruginous ; first 

 segment of abdomen entirely ferruginous. Length % .60 inch. 



151. animosus, Cress. Proc. Ent. Soc. Phil, iii, p. 164, % . 

 var. rubellus, Cress. Proc. Eut. Soc. Phil, iv, p. 254, S . 



Hab. — Col., N. Mex. A slender black species, with face, clypeus, 

 scape beneath, tegulae, scutellum, four anterior legs, basal half of pos- 

 terior tibiae and their tarsi yellow; wings clear; abdomen ferruginous, 

 with first segment entirely and base of remaining segments more or 

 less black. The var. rubellus has paler abdomen and the metathorax 

 is more or less yellow behind. Length % .50 inch. 



152. discus, Cress. Proc. Ent. Soc. Phil, iii, p. 168, S . 



Ilab. — Colorado. Closely allied to animosus^ but the legs, except 

 coxae and trochanters, are entirely yellowish-ferruginous; the meso- 

 thorax is more or less dull ferruginous; the second and following ab- 

 dominal segments are narrowly black at base. Length % .50 inch. 



153. allapsus, Cress. Proc. Ent. Soc. Phil, iv, p. 256, S . 



Ilab. — Colorado. A black species, with the abdomen entirely dull 

 ferruginous, except the first segment which is black; wings clear; 

 face, clypeus, scape beneath, tegulae, scutellum, sometimes two spots 

 on metathorax behind, four anterior legs, posterior tibia) except tips, 

 their tarsi and ventral fold, bright lemon-yellow. Length S .55 — 

 .60 inch. 



154. vinulentus, Cress. Proc. Ent. Soc. Phil, iii, p. 162, S . 



Ilab. — Colorado. Larger than allapsus which it closely resembles, 

 but differs principally by the pule markings being white instead of 

 lemon-yellow, and by all the coxa; being black. Length % .65 — 

 .70 inch. 



155. nuncius, Cress. Proc. Cal. Acad. 1877. 



Hab. — California. Resembles allapsus, but the abdomen is paler 

 in color; the posterior femora and tibiae except tips and apex of 

 postpetiole, are ferruginous; apex of metathorax, scutellum, face, and 



