126 [August 



20. Cerceris compar, n. sp. 



Black : face, scape in front, interrupted line on collar, another on scutelluni. 

 most of legs, and narrow bands on abdomen, yellow; wings subhyaline. 



Male. — Black, deeply and closely punctured ; the face entirely, the 

 mandibles more or less and the scape in front, yellow ; rest of antennae 

 black above, fulvous beneath. Thorax: a line on the collar, inter- 

 rupted in the middle, sometimes widely, a spot on the tegulse, a slightly 

 interrupted line on the scutelluni, and sometimes a longitudinal line 

 on each side of the metathoi-ax, pale yellowish, the basal enclosed space 

 of the latter channelled down the middle with a few deep punctures 

 on each side. Wings subyhaline, the apical margin and marginal cell 

 pale fuscous ; uervures pale ferruginous. Legs black ; the coxa), tro- 

 chanters, tips of the four anterior femora, their tibiae and tarsi, basal 

 two thirds of the posterior tibia3 and the base of their tarsi, yellow. 

 Abdomen convex, strongly punctured ; each segment, except the last. 

 with a very narrow, continuous, subapical, yellow fascia, scarcely 

 broader on the sides; venter black,, shining, imraiculate. Length il 

 — io lines ; expanse of wings 6 — 8 lines 



^a6.— Illinois. (Dr. Lewis.) Coll. Ent. Soc. Philad. 



Threes specimens; 9 unknown. Resembles the preceding species. 

 but is more compact, with the posterior femora entirely black, and the 

 basal segment of the abdomen with a narrow continuous fascia similar 

 to those on the following segments. 



21. Cerceris fulvipes, n. sp. 



Black; spots on face, two on collar, tegulfe, line on postscutellum, two spots 

 on metathorax, and bands on abdomen, yellowish-white ; legs fulvous, wings 

 subhyaline. 



Female. — Black, somewhat shining, thinly clothed with a pale pu- 

 bescence ; head closely punctured ; a subtriangular mark on each side 

 of the face, a small spot on the clypeus, emarginate before, mandibles 

 except tips, and a spot behind the eyes near the summit, obscure whit- 

 ish ; antennae black, the flagellum fulvous beneath. Thorax more 

 sparsely punctured, elongate and somewhat confluent on the mesotho- 

 rax, very sparse on the scutellum; spot on each side of the collar, 

 tegulae, postscutellum, and an ovate spot on each side of the metathorax, 

 yellowish-white ; the enclosed basal space of the latter finely and 

 somewhat obliquely striated. Wings subhyaline, slightly tinged with 

 yellowish, faintly iridescent, apex fuscous ; nervures pale ferruginous. 

 Legs fulvous ; the coxjii and anterior femora behind, blackish ; the 

 tibiae tinged with yellow exteriorly. Abdomen rather sparsely punc- 

 tured ; first segment with a yellowish-white spot on each side, and a 

 continuous, apical band of the same color on the four following segments. 



