18G5.] 155 



the costa ; costa, from the stigma to the base, pale yellowish. Legs. 

 including their coxae, yellow; the anterior femora and tips of the tarsi 

 tinged with ferruginous; posterior tibias dilated at tip, with the margins 

 reflexed, as in the preceding species. Abdomen dull ferruginous, sub- 

 opaque, deeply and grossly punctured ; most of the first segment and 

 the apical margins of the third, fourth and fifth segments obscurely, 

 yellowish, the latter much attenuated in the middle and wider on the 

 sides; apical segment and venter more or less pubescent. Length t! 

 lines; expanse of wings 9 lines. 



Collection — Dr. J. Gundlach. One specimen. 



Closely allied to C. flavocostnlit, but is at once distinguished by the 

 deep and coarse punctation. 



Cerceris bilunata, n. sp. 



Black, coarsely punctured; apical half of abdomen ferruginous; face, collar, 

 tegulse, spot beneath the wings, scutellum, two large lunular spots on metatho- 

 rax, legs, a band on the first and second abdominal segments and narrow api- 

 cal margins of the third and fourth segments, all yellow; wings fusco-hyaline. 

 dark at tip. 



Male. — Black, deeply and coarsely punctured, slightly pubescent; 

 face, a small spot behind the antenna), clypeus, mandibles, except tips, 

 and line or spot on the cheeks, yellow ; clypeus large, flat, rounded at 

 base and in front; the space on each side of clypeus fringed with sil- 

 very pubescence; antennae obscure fulvous, fuscous beyond the middle 

 nearly to the tips, sometimes entirely fulvous; basal joint beneath 

 yellowish. Thorax black ; the collar, a spot on each side of pectus, 

 tegula;, a spot beneath the wings, scutellum, and a large lunular spot 

 on each side of metathorax, all yellow; postscutellum tinged with fer- 

 ruginous, the enclosed triangular basal space black and obliquely stri- 

 ated. Wings pale fusco-hyaline, much darker at tips ; nervures pale. 

 Legs yellow, the tarsi more or less tinged with ferruginous. Abdomen 

 deeply and coarsely punctured, the three basal segments black, the 

 remaining segments ferruginous, sometimes the apical half of the third 

 seoment is ferruginous ; the first and second segments each with a 



DO/ O 



rather broad apical yellow band, the third and fourth segments with 

 narrow yellow apical margins, subobsolete on the fourth segment; be- 

 neath, the second segment is almost entirely yellow, the remainder fer- 

 ruginous, clothed with sericeous pubescence. Length 4h lines; expanse 

 of wings 6f lines. 



Collection. — Ent. Soc. Philad. Two specimens. 



Easily recognized by the tricolored — black, ferruginous and yellow — 

 abdomen. 



