14 AMERICAN HYMENOPTERA. 



•J, . — Clypeus shorter, subemarginate. silvery; antennse nearly as long as bead 

 and tborax, subclavate, joints 2-5 or 6 of tlagellura, prominently rounded be- 

 neath ; enclosure of middle segment sulcate medially, witbout an area as in tbe 

 9 , the sculpture coarser and more irregular, that of tbe posterior face very 

 coarse: the latter depressed above medially, and apical tbe rugse forming two 

 large, smooth areas; petiole perhaps a little shorter than in J ! '"^d of abdomen 

 sometimes not extending beyond second segment; tibife and tarsi reddish testa- 

 ceous; width of second submarginal cell at top variable. Length 5-6 mm. 



Hudson Bay (Smith;; Canada. 



19. Psen pauper Pack. 



Mimesa pauper Packard, 1. c, 409, % , 1867. 



Mimesa paupera Provancber, Nat. Can. xiii, 79, ^ %, 1882. 

 9 . — Head rather finely and closely punctured ; face silvery, the clypeus 

 sparsely; clypeus indistinctly emarginate, its length barely equal to half its 

 width ; space between bind ocelli somewhat less than that between them and 

 eyes; antennse. about as in 6orea/is,- dorsulum more distinctly punctured : enclo- 

 sure of middle segment with transverse rugae apically, those toward the sides 

 oblique; posterior face with strong rugse, near the sides becoming rugoso-reticu- 

 late, deeply sulcate down middle ; abdomen with apex of first segment and 

 second entirely reddish; petiole about two-thirds as long as hind femur, above 

 strongly sulcate near sides, the latter with a narrow furrow ; second submarginal 

 cell narrowed about three-fourths above. Length 7 mm. 



%. — Punctures of tbe bead closer; face and clypeus silvery, tbe latter con- 

 siderably smaller, emarginate ; antennse shorter than in borealis, considerably 

 shorter than bead and tborax. subclavate, the basal joints of fiagelluni not notice- 

 ably prominent beneath; enclosure of middle segment much as in 9. but the 

 sculpture coarser; posterior face depressed medially, coarsely rugoso-reticulate ; 

 sides rugose almost to base; tips of femora, tibige and tarsi reddish testaceous; 

 petiole of abdomen slightly slenderer and longer than in 9- with tbe furrow of 

 sides stronger; the petiole is distinctly shorter than in •'J, of borealis ; second sub- 

 marginal cell narrowed somewhat more than one-half above. Length 5.5-6 mm. 



Illinois ; Westville, New Jersey, in middle of August. 



A series of four males and one fen}ale from Montana, South Da- 

 kota and Colorado does not seem to differ specifically, although the 

 specimens are larger, the red of legs brighter and that of abdomen 

 extending upon the third segment. 



20. Psen cingulHtu!« Pack. 



Mimesa cingulata Packard, 1. c, 410, %. 1867. 

 % ■ — Very much like pauper in general appearance ; antennje heavier, the fla- 

 gellum more clavate and not so long ; thorax practically as in pauper ; legs pale 

 testaceous ; petiole of abdomen a little shorter than in pauper, sulcate laterally, 

 tbe sides rather distinctly sulcate ; first segment testaceous, second reddish ; second 

 submarginal hardly narrowed one-half above. Length 5 mm. 



Brunswick, Maine, in August. Only the unique type examined. 

 It is very close to P. pauper, but its very pale legs will serve in dis- 

 tinguishing it. Its antennse are testaceous, and the prominence 

 between antennse is not more prominent than usual. 



