32 [™y> 



joint of the intermediate tarsi above. Posterior tibiae, except the glabrous enclosure 

 at base, and the basal joint of the posterior tarsi, except at tip, clothed externally 

 with white pubescence, that on the basal joint of the tarsi beneath fuscous ; claws 

 yellow at the base ; calcaria pale testaceous, those of the posterior tibiae arising close 

 together. Abdomen shining, delicately punctured ; a little white pubescence at the 

 base, very delicate continuous white fasciae at the base of segments two to five, visible 

 only when the abdomen is extended, a narrow white fascia at the tip of the third 

 and fourth segments, widely interrupted on the third segment, and scarcely inter- 

 rupted on the fourth ; the fimbria on the fifth segment white. The glabrous 

 enclosure on the sixth segment black or pieous, and with a smooth border. The 

 apical margins of the ventral segments testaceous, and clothed with griseous 

 pubescence. 



Numerous specimens taken at Waterbury, Conn., on the flowers 

 of Lysimachia ciliata, from July 3rd to 22nd ; of Rhus glabra, from 

 July 22nd to August 7th ; and of Archangelica hirsuta, August 14th. 



Var. — The base of metathorax without punctures and shining, the tegulae dark 

 piceous. 



One specimen taken at New Haven, Ct., on the flowers of Rhus 

 typhina, July 2nd ; and one specimen taken at Waterbury, Ct., on the 

 flowers of Lysimachia ciliata, July 22nd. 



Var. — Differs from the preceding variety in having the tegulae testaceous. 



Two specimens taken at New Haven, Ct., on the flowers of Rhus 

 typhina, June 21st. 



Var. — No hairs on the clypeus, tegulae dark piceous, base of metathorax without 

 punctures and shining, scutellum fringed behind with griseous hairs, the ferruginous 

 stripe under the intermediate tarsi not extending upon the first joint, basal joint of 

 posterior tarsi with fuscous hairs externally upon its apical half, the white fasciae 

 upon the abdomen obsolete, the fimbria mostly fuscous, and the apical margins of 

 the ventral segments dark piceous. 



Two worn specimens taken at "Waterbury, Ct., on the flowers of 

 Lysimachia ciliata, together with a specimen of the typical form, 

 July 17th. 



3 . Length, T 5 5 in., expanse, \% to \% in. Antennae nearly as long as the head 

 and thorax ; flagellum fulvo-testaceous beneath ; the scape entirely black, with a 

 fringe of white hairs on each side, and with shorter hairs in front ; second joint of 

 the flagellum narrowed at base, and scarcely longer than the first, third joint scarcely 

 one-half the length of the second, as thick as the apex of the second, joints four to 

 eleven each equal in length to joints two and three taken together, but not so thick 

 as the third joint, last joint a little longer than the eleventh. The face below the 

 insertion of the antennae, and a spot at the base of the mandibles, yellow ; labrum 

 black ; pubescence on head and thorax longer than in the female, white ; thorax 

 shining, punctured, base of metathorax polished and without punctures ; tegulie 

 testaceous ; nervures and stigma testaceous ; pubescence on legs white, that on the 



