MONOGRAPH OF THE NORTH A:\IEHTCAN PROCTOTRYPID^. 105 



Maxillary palpi 5-joiuted; labial palpi 3-jointe<l. 



Mandibles bidentate at tii)s. 



Thorax subovate, the prothorax not visible from above, contracted 

 into a little neck at the junction with the head; mesonotum siibde- 

 piessed, with 3 furrows; sciitelliuu large, sub<'onvex, longer than wide, 

 I'ounded posteriorly and with a distinct frenuin; nietathorax short, 

 slightly eniarginate, with 2 teeth at base. 



Front wings with a large, oviil stigma, a parastigma and a curved 

 stigma 1 vein. 



Abdomen subsessile, ovate, siibc^nvex above, convex beneath, the 

 second segment occupying fully two-tliirds of tlie whole surface, longi- 

 tudinally striated, the following segments very short, the last pointed. 



Legs moderate, pilose, the femora slightly swollen, the i)osterior pair 

 the thickest, tibia^. subclavate, the tibial spurs not very well developed, 

 tarsi shorter than their tibia'. 



The genus is distinguished from other genera with 3 mescnotal fur- 

 rows, by the 2 erect teeth or spines at the base of the metathorax^ 

 the larger flattened scatellum, and the longer, denser pilosity of the 

 legs. 



Two closely allied species are known in our fauna, separable as fol- 

 lows : 



FEMALES. 



Legs black, base and tips of tibiae aud the tarsi, dark rufous. 



Antfiina", except sometimes the first 2 fiagellar joints, black; the first llagellar 

 joint thrice as long as the pedicel; axillie separated from the scutellum by 5 



large punctures H. akmatus Say 



Legs black, trochanters, bases, aud tips of femora, ti1)i;e except at the middle aud 



tarsi, rufous. 



Antenna' black, the scape, pedicel and first 2 fiagellar joints, rufous; the first fia- 



gellar joint less than thrice as long as the pedicel; axilhe separated from 



the scutellum by 8 punctures H. fuscipennis Asian. 



MALES. 



Axilhe separated from the scutellum by 5 large punctures. 



P^irst flagellar joint a little longer than the scajie; last joint of i)ali)i nearly twice 



as long as the fourth H. a km atus Say 



Axilhe separated from the scutellum by 8 punctures. 



First llagellar joint not longer than the scape ; last jidnt of i)alpi iu)t one-half longer 

 than the fourth H. fuscu'EXNLs Ashm. 



H. fuscipennis Ashm. 



Me<ia><pllodfS funcipennis Ashm.. Hull. 3, Kans. Ex]). Sta. App., p. ii, 1888. 



$ 9 , Length, 3.5""". Shining black, ])ilose; head and thorax ante- 

 liorly I'ugose, resst of the thorax smooth, the face with a narrow, smooth 

 space in front of the ocelli, antennal depression absent. Maxillary 

 ])idpi long, the last joint 1^ times longer than the fourth. Antenme 

 11 jointed, in 9 incrassated toward tips, the scape long, obclavate; the 



