182 BULLETIN ir., UNITED STATE8 NATIONAL MUSEUM. 



Li'j^s ijitlior loiij^-, slender, pilose, tlie tibiie chivtite, their spurs »ve;ik, 

 the tarsi imich longer than the tibia', slender, the claws simple. 



Closely allied to Prosavaidhn, but readily distinguished by the })ost- 

 scutelluni being" armed with 3 spines, and the first alxlominiil seg;- 

 ment bearing a horn, as in (Udotclein Westwood, in the tribe SceJUmini. 

 The male is unknown. 



Pentacantha canadensis Ashiii. 



(PI. viH, Fiji. 1,9.) 



loc cit. ]i. ")!. 



9 . Length, 2""". Black ; thorax and seutellum coarsely shagreened, 

 oj)aque; the head smooth, shining, with some grooved lines back of 

 the eyes and on the occ.iput, the vertex rather acute. Antenna^ 12- 

 jointed, brown, the first funiclar joint twice as long as the pedicel, the 

 second one third shorter than the first, the third about as long as wide, 

 the fourth Avider than long; club C-jointed. Thorax a little wider 

 than long, without furrows, the postscutellum with .'> erect spines, the 

 lateral posterior angles of the metathorax acutely spined. Legs, in- 

 cluding anterior cox.p, honey-yellow or brownish-yellow; middle of the 

 femora and tibia' and the i>osterior coxse, dark brown or fuscous. Ab- 

 domen polished black, the third segment the longest and widest, the 

 first with a horn at base, this as well as the second and the third, except- 

 ing on its disk, longitudinally striated. Wings snbhyaline, the vena- 

 tion rufo-piceous. 



Habitat. — Ottawa, Canada, and Kansas. 



Type, 9 in Coll. Ashmead. 



The type was described from a single specimen receive<l from AV. H. 

 Hariingt(Mi, but I have since seen a specimen in Prof. Topenoe's col- 

 lection, taken in Riley County, Ivans. 



TRISSACANTHA Asbui. 

 Ent. Am., Ill, p. 101 (1887). 

 (Type, T. amtrica»(( Ashiii.) 



FTead transverse, the occiput almost straight, margined; ocelli 3, 

 close together in a triangle; eyes oval. 



AntenuiB inserted on a clypeal prominence, 12-jointed, in $ very long, 

 filiform, cylimlrical, the scai»e extending to the ocelli, the ]>edicel very 

 snuill, annular, the third funiclar joint bent and angulated at the 

 middh'. 



Maxillary ])alpi .'Vjointed. 



Mandibles bidentate at tips, the teeth equal. 



Thorax ovoid, the i)rothorax slightly visible from above, the mesono- 

 tum smooth, wider than long, with two delicate but distinct furrows, 

 s<'utcllum s<'niicircu]ar, convex, nu'tascutellum aimed with 3 erect 

 spines, metathorax short, the i)leura more or less covered with a gray- 

 ish woolly ])ubescence, the angles acute. 



