NORTH AMERICAN HYMENOPTERA. 321 



so, none of tlie reniaiiiing joints apjiearinfi dentate, beiuf; rounded out beneath, 

 the apical joint about twice as louji as the precedino; one; dorsuluni punctured 

 as usual, the two impressed lines on anterior portion not strong; scutelluni not 

 impressed medially ; metathorax strongly rugose, the basal portion of nietaplenrae 

 finely and obliquely striated. Abdomen glabrous, scarcely punctured ; black ; 

 antennfe testaceous, palest beneath ; scape beneath, mandibles, except tips, tuber- 

 cles and spot on tegulse, yellowish. Legs reddish testaceous, the coxte, trochan- 

 ters and femora, more or less black; the fore tibise in front and the remaining 

 four at base yellowish. Wings hyaline, iridescent, nervures and stigma black: 

 front and clypeus with silvery pile. Length 6—7 mm. 



Nevada. Two specimens. 



Unidentified. 



Pa$$salceciis ciispidatiis Sm. 



■■ 9. Length 3.i lines. — Black; the head finely and closely punctured; the 

 scape in front, the labrum and mandibles yellow, the latter rufo-piceous at the 

 apex; the palpi yellow. Thorax finely and closely punctured on the disk ; the 

 metathorax coarsely rugose; the wings fusco-hyaline, the costal nervure and 

 stigma black, the nervures testaceous; the anterior tibiae in front, the tubercles 

 and base of the posterior tibise yellow: the apical joints of the tarsi fusco-ferru- 

 ginous, the anterior pair palest. Abdomen : the petiole very short, rugose above : 

 the abdomen smooth and shining." 



Hudson's Bay. This species is evidently allied to, if not identical 

 with, P. viandibularis Cress. 



SPILO:VIEIV.4 Shuckard. 



SpilomeiiM pusilla Say. 



" 9 • — Head and thorax not shining like the abdomen ; wings beautifully iri- 

 descent; mandibles, basal joints of antennse, the tegulse and legs, dr.ll lioney- 

 yellow, tubercles black, the coxse and femora more or less black ; upi)er face of 

 metathorax enclosed by two ridges which curve inwards to unite on the verge 

 of the truncation, the enclosure transversely'reticulated and divided into three 

 areas by two longitudinal ridges; ajiical segment of the abdomen comjiressed 

 and acuminate." (Patton) 



Indiana (Say) ; Waterl)ury, Conn. (Patton). 



STIGMIIS Jurine. 

 FEMALES. 

 Clypeus not bilobate, at the most slightly emarginate medially. 



Third joint of antennse longer than the fourth, the second joint much shorter 

 than either the third or foniib, ai>ical joint not at all si)atul;ito, iiointed 



at tip. Length 4 mm aiiiioriraiius. 



Third joint of antennie about (-(luul to the fourth, the second joint longer 

 than either the third or fourt li. ajiical jiiiil somewhat spatulate. Length 

 .5.5 mm f raternus. 



TKANS. AM. ENT. SOC. XIX. (41) DECEMBER, 1892. 



