MONOGRAPH OF THE NORTH AMERICAN PROCTOTRYPID^. 33 



A well-defined genus, but the males easily confused with Upyris. 

 The more strongly developed venation, the distinct, rhomboidal dis- 

 coidal cell, the transverse medial nervure being always oblique and 

 not so much curved as in Upyris; the 4 distinct mesonotal grooves, 

 coarser sculpture, and the less distinctly swollen femora will, however, 

 readily distinguish the genus. The females have frequently been mis- 

 taken for those of other genera, but the characters given in the table 

 readily separate them. Many species described under the genus 

 Scleroderma belong here. 



Mocsary's work ''Magyar Fauna, etc.," in which this genus is placed 

 with the Sapygidoe as a subfamily Pristocerintc, I have not been able 

 to sec. 



The species in the United States are not luimerous, but two being 

 known to me, separated as follows : 



Females wingless 2 



Males winged. 



Black ; the head coarsely rugose, with large punctures. 

 Large, 10-11'"™.; flagellar joints at apex more or less serrate.. P. atra King 



Moderate, 7-8"^™.; flagellar joints at apex not serrate P. armifera Say 



2. Large, 7 to S'"'". Rufo-piceous, the abdomen paler, the head and thorax 

 with coarse scattered punctures. 



Mandibles 4-dentate P. atra Klug 



Smaller, 4""". Rufo-piceous, the abdomen darker, smooth, shining, impunc- 

 tured. 

 Mandibles 3-dentate ...P. armifepa Say 



Pristocera atra King. 

 (PI. II, Figs. 1, c?; 2, 9.) 



Web. u. Mohr Beitr. zur Natur ii, 202, £ ; AVestw. Thes. Ent. Oxon., p. 163, pi. 



XXXI, f. 5; Cress. Syn. Hyra., p. 247. 

 Scleroderma thoracica Westw., Trans. Ent. Soc. Lond., ii, p. 167, 9 ; Cress. I. c. 



S . — Length 10 to 11™"". Black, shining, punctate, sparsely covered 

 with a white pile. Head quadrate, coarsely reticulately punctate. 

 Mandibles black. Palpi x>iceous. Antennte 13-jointed, very long, 

 longer than the head and thorax together, tapering toward tips, the 

 flagellar joints about four times as long as thick, truncate at tips and 

 slightly produced toward one side, appearing somewhat serrate. Col- 

 lar rather short, rounded before, rugose and hairy. Mesonotum smooth, 

 with some scattered punctures and 4 parallel grooved lines. Meta- 

 thorax rugose, with raised lines and a slight median carina; the raised 

 lines at base are short, longitudinally directed, those beyond transverse 

 and irregular. Abdomen ovate, depressed, subpetiolate, highly 

 polished, black, shorter than the thorax, and with a deep longitudinal 

 furrow at base. Wings fusco-hyaline, the costa and stigma black, 

 the other nervures brown ; the stigma is somewhat ovate, the second 

 basal cell (submedian) is a little longer than the first, the first discoidal 

 cell distinct, while two other discoidal cells are plainly discernible by 

 water-colored nervures. 



21899— No. 45 3 



