134 Journal New York Entomological Society. [Voi. xii. 



middle ones, swollen beneath, the swollen surface being shining and yellow ; pos- 

 terior femora ferruginous beneath, with two dark longitudinal stripes ; hind tibire 

 somewhat contorted, with a subhyaline saw-toothed posterior edge ; joints of 

 hind tarsi stout ; abdomen constricted between the segments, with a peculiar ap- 

 pearance from the very large punctures ; general color yellow, black at the sutures 

 and on disc of first segment, broadly red on discs of second to fifth segments, the red 

 bounded behind by yellow ; apex broadly truncate, the sides of the truncation some- 

 what pointed, and the margin wavy with a double curve ; ventral surface yellow with 

 three broad black bands, and a pair of brown club-shaped marks, joined basally, on 

 first segment, the surface of the segments also thinly covered with long appressed 

 hairs. 



Habitat. — " New Mexico "; no other particulars known. In Coll. 

 Acad. Nat. Sci., Phila. 



Cerceris ferruginior, new species. 



$ . Length 9 mm.; black, yellow and red ; strongly punctured, the punctures 

 on the front very close, on the mesothorax large and well separated on a shining 

 ground, on the abdomen quite close. Face light yellow, nearly up to level of ante- 

 rior ocellus, vertex and occiput black, the black extending downwards as a tongue to 

 the base of each antennae ; cheeks black, with a triangular yellow mark on the lower 

 part ; mandibles yellow at base, ferruginous in the middle, and black at the end ; 

 clypeus ordinary; a little brush of stiff yellowish hair overlapping the base of each 

 mandible ; scape curved and slightly swollen, yellow in front, ferruginous behind ; 

 flagellum with the base ferruginous, passing into black above, the extreme apex red ; 

 prothorax with the whole of the upper part broadly yellow, with a dark ferruginous 

 stain in the middle, tubercles yellowish-ferruginous ; pleura ferruginous, suffused with 

 black along the margins, and with a yellow patch just behind the tubercles ; meso- 

 thorax black ; tegulse lemon-yellow ; scutellum yellowish-ferruginous, edged with 

 black in front and behind ; postscutellum yellow ; metathorax with the enclosure and 

 a stripe passing downwards from it, black ; the enclosure very distinct, smooth, im- 

 punctate, triangular ; sides of metathorax ferruginous suffused with yellow, strongly 

 but rather sparsely punctured ; wings nearly clear, with the marginal and submarginal 

 cells, and especially the apex, clouded with black ; stigma orange-ferruginous nervures 

 fuscous first recurrent nervure joining second submarginal cell about one third of its 

 length from the base, legs ferruginous, tibia; and basal joint of tarsi mostly yellow ; 

 hind tibce with a large blackish apical blotch behind ; small joints of hind tarsi fuscous; 

 hind coxce with a rounded apical lamina ; abdomen stongly constricted at the sutures 

 laterally ; first segment narrow, suboval, less than half the width of the second, fer- 

 ruginous ; second to sixth yellow, second with a large ferruginous basal patch, third 

 to fifth largely black at base ; apical plate ferruginous, truncate ; venter with the first 

 two segments red, the second with large sparse punctures, the other segments banded 

 with black and light yellow, the yellow stained with ferruginous in the middle. 



Habitat. — Southern New Mexico (Cockerell, B 46). The type 

 was collected at Deming, in July. 



