362 BULLETIN UNITED STATES GEOLOGICAL SUEVEY. [TolY. 



ing joints are small and compressed, and their spines are obsolete, the 

 intermediate femora are serrulate beneath nearly to tlie base, the first 

 joint of the intermediate tarsi is much arcuated and excavated beneath, 

 and has a longitudinal row of three or four stout spines near ^he base ; 

 the abdomen is slightly pubescent, the disk of the second ventral seg- 

 ment has a tubercle on each side of the median Hne, the lateral margins 

 of the seventh dorsal segment are fringed with short stout spines 

 towards the base, the seventh and eighth ventral segments are clothed 

 with long pubescence; the three terminal spines are large, the median 

 spine compressed and slightly curved downward, the lateral spines 

 flattened and slightly hooked. 



The S is black ; the labrum, mandibles, except the tip, the sides of 

 face and connected spot between antennoe, an irregular line beneath the 

 ocelli, sometimes interrupted, the scape of the antennce, excepting a 

 spot above, the second and third joints of the antenuse beneath, the 

 posterior orbits, the prothorax, excepting a spot in front and a line each 

 side, a large spot on each side of the i^leura beneath, the tubercles and 

 a line behind them,, the tegulse and a line above them, a line on the 

 scutellum, another on the x>ostscutellum, a spot above the intermediate 

 coxae, th* angles of the metathorax, an angulated line on the disk of the 

 metathorax, a large spot on each side of the first segment of the abdo- 

 men, four spots on the second segment, sometimes connected, narrow 

 irregular fasciae on segments three to six, the tip of the seventh seg- 

 ment, a fascia on the first ventral segment, and spots on three or four of 

 the following segments, all yellow or yellowish-white. The legs are col- 

 ored as in the female, excepting that the terminal joint of the four ante- 

 rior tarsi is black, strongly contrasting with the preceding joints. 



29. MoNEDTJLA VENTRALis Say, 3 2. 



30. Bembex sayi Cress., 9. 



All the coxae are yellow externally, and all the tibiae have a black 

 spot or stripe internally ; there is a black dot on the four anterior knees, 

 and two black dots on the posterior knees. In one of the si)ecimens 

 the fascia on the third segment of the abdomen encloses two black 

 spots similar to those on the second segment. 



This is not Say's variety of fasciata ; the ? of the latter has been 

 described under the name of texana Cress., and is a distinct species. 



31. MiCEOBEMBEX MONODONTA (Say), 5 . 



Syn. Bemlex monodonta Say. 



The 2 of this widely distributed species has never been described ; a 

 Connecticut specimen presents the following characters : 



Black; the face with a dense silvery pile, the vertex with long silvery 

 pubescence, thorax and abdomen with a microscopic silvery pubescence, 

 which is more dense on the sides. Base of the mandibles, sides of the 

 labrum, hne on posterior orbits, hne on collar connected with the tuber- 



