360 BULLETIN UNITED STATES GEOLOGICAL SURVEY. [Vol. V. 



segments. Tellow fascise on all tlie abdominal segments except the last, 

 the fascia on the first segment notched on the disk, the others much 

 dilated at the sides, those on the second, third, and fourth segments 

 abruptly so ; narrow anterior margin of the fascia on the first segment, 

 the extreme sides and the venter of the first and second segments, and 

 the apical margins of the other ventral segments ferruginous. Wings 

 hyaline, the marginal and submarginal cells occupied by a smoky stripe, 

 which is darker and violaceous beyond the stigma, the costa and stigma 

 yellow. Length 11""". 



In a larger specimen (length 14""") the ferruginous color is more ex- 

 tended and of a fulvous tint ; on the face there are only a small spot 

 enclosing ocelli and short stripes at the base of antennse remaining black ; 

 the collar, tubercles, three spots beneath the wings, two spots on scutel- 

 lum, the sides of the metathorax almost entirely, the posterior margin 

 of the metathorax, and the legs are ferruginous ; three fine lines on collar, 

 a dot on the tubercles, a line on the scutellum, and a dot on each side 

 of the metathorax posteriorly are yellow. The transverse impression on 

 the second segment of the abdomen is punctured similarly to the other 

 portions of the segment, the i^unctures on the vertex and on disk of 

 thorax are more sparse. The three anterior fasciae of the abdomen are 

 broadly bordered with ferruginous, and the apical segment and the 

 venter are entirely ferruginous. 



From U.fulvipes Cress., this species differs in being larger, in having 

 ferruginous markings, in the vertex being more sparsely punctured, and 

 the enclosure of metathorax being less closely striate. The margin of 

 the clypeus has two teeth and a niedian i)rocess, and the upper portion 

 of the median lobe has a stout conical protuberance. In JE. fulvipes, the 

 median lobe of the clypeus is flat or slightly convex, and the anterior 

 margin is armed with four distinct teeth of equal size. In other respects 

 the species are much alike. 



In the <? of E. fulvi])es the side lobes of the clypeus are separated from 

 the median lobe by a short suture, the suture above the lobes is oblique 

 and the clypeus does not touch the eyes ; the middle of the anterior 

 margin has three short teeth, of which the central one is the smallest. 

 The fifth ventral segment has a marginal fringe of long curved bristles ; 

 the eighth ventral segment is produced beyond the seventh dorsal and 

 its narrowed tip is terminated by two teeth ; the limiting carinse of the 

 dorsal area are prolonged into divergent teeth. 



25. Cerceris ftjlyipes Cress., 9 . 



Differs from eastern specimens only in the more developed yellow 

 markings. It may be a variety of the C. occipitomaculata Pack., for 

 that species, although it is said to be closely allied to C. nigrescens, is 

 described as having the clypeus depressed. In this specimen there is 

 a yellow sjjot on disk of clypeus, and none on scape of antennse or on 

 interantennal ridge ; the legs are fulvous, the coxse more or less, and a 



