120 [August 



veloped lateral yellow spot, sometimes almost confluent on the disk. 

 Length 62 — 8 lines; expanse of wings 11 — 12J lines. 



Hah. — Rocky Mountains, Colorado Territory. (Ridings.) Coll. Ent. 

 Soc. Philad. 



Six % specimens ; $ unknown. May possibly be the male of the 

 preceding species. 



7. Cerceris vicina, n. sp. 



Black ; sides of face, clypeus, scape of antennae in front, two spots on collar, 

 tegulse, line on postscutellum, two spots on metathorax, sometimes wanting, 

 and bread bands on abdomen, yellow; legs mostly honey-yellow; wings fus- 

 cous. 



Female. — Black, closely and deeply punctured, sparsely clothed with 



pale pubescence ; clypeus scarcely prominent except at tip which is 

 somewhat produced and subtruncate ; sides of the face broadly, cly- 

 peus except apical margin, base of mandibles, sometimes a dot above 

 the clypeus, a dot behind the summit of the eyes, and the scape in 

 front, lemon-yellow ; sometimes the lateral lobes of the clypeus are 

 blackish with a yellow spot on each ; antennae fulvous, blackish at 

 tips above. Thorax : collar tinged more or less with ferruginous, a 

 transverse spot on each side, tegulae, postscutellum, and a more or less 

 developed elongate-ovate spot on each side of the metathorax, wanting 

 in one specimen, yellow ; triangular basal space of metathorax opaque, 

 and covered with dense elongate striae. Wings yellowish-fuscous, 

 darker on apical margins and marginal cell, and with a violaceous re- 

 flection. Legs honey-yellow, tips of the four anterior femora, their 

 tibiae and most of their tarsi, the posterior femora beneath, and their 

 tibiae and tarsi exteriorly, yellow. Abdomen : first segment more or 

 less ferruginous in two specimens, in one immaculate, in the other with 

 a lateral yellow spot, and in the third specimen black with a broad, 

 slightly interrupted yellow band ; second segment with a very broad 

 yellow band, leaving only the basal margin of the segment black ; the 

 three following segments each with an apical yellow band, broad on 

 the sides and much narrower on the middle anteriorly, that on the fifth 

 segment the broadest; apical segment more or less ferruginous, 

 venter banded with fulvo-ferruginous. Length 5^ lines ; expanse of 

 wings lO'j lines. 



HaJ). — Rocky Mountains, Colorado Territory. (Ridings.) Coll. Ent. 

 Soc. Philad. 



Three 9 specimens ; % unknown. Closely related to the preceding 

 species, but smaller. 



