286 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.58. 



Type locality. — Hyattsviile, Maryland. 



Type.— Cat. No. 22150, U.S.N.M. 



Described from two females collected September 1, 1912, by 

 J. R. Malloch. 



The paratype differs in lacking entirely the black on the head and 

 in having all the tergites more or less brownish. 



CREMASTUS (ZALEPTOPYGUS) LATITHORAX, new species. 



Female. — Length, 5.25 mm.; antennae, 4 mm.; ovipositor, 1.5 mm. 



Of same size and form as ohesus, but at once distinguishable by 

 the shorter ovipositor, and differing from that species only as follows: 

 Diameter of lateral ocellus slightly shorter than ocell-ocular line; 

 petiolar area not striate; second recurrent vein barely longer than 

 first abscissa of subdiscoideus; second tergite distinctly more than 

 half as long as first; ovipositor sheath barely a half longer than first 

 tergite. 



Paler throughout; head less contrastingly colored, the black 

 replaced by fuscous; antennae brown; venation light brown. 



Type locality. — Sabinal, Texas. 



Type.— Cat. No. 22151, U.S.N.M. 



One female collected by F. C. Pratt and labeled "Hunter No. 2106." 



CREMASTUS (ZALEPTOPYGUS) ATTENUATUS, new species. 



Chiefly remarkable for its extreme slenderness, being reminiscent 

 in this respect of the genus Eiphosoma Cresson, and for the fact that 

 the first tergite completely encircles the petiole. In the latter char- 

 acter it resembles anomalus Cushman, to which the female runs in 

 my key on most of the characters. The male of the latter species is 

 unknown and the male of attenuotiis runs on most of the characters 

 to Ulineatus Cushman, from which it differs in the petiolar character, 

 habitus, and color of the abdomen. 



Ferruile.— Length, 12 mm.; antennae, 8 mm.; ovipositor, 2 mm. 



Head barely as wide as thorax, ver}^ narrow behind eyes, temples 

 weakly convex; diameter of lateral ocellus subequal to ocell-ocular 

 line, which is barely half as long as postocellar line; face and frons 

 very finely, densely punctate, the former with a minute polished 

 tubercle above; malar space as long as basal width of mandible; 

 clypeus convex, broadly rounded at apex, nearly as long as inter- 

 foveal line; thorax and propodeum minutely, densely punctate, 

 thorax laterally and propodeum entirely clothed with long, dense, 

 silvery pubescence; scutellum weakly carinate laterally; propodeum 

 arcuate from base to apex, extending only a short distance beyond 

 base of coxae, insertion of petiole far down between coxae, petiolar 

 area much longer than areolet, latter much longer than wide, dis- 

 tinctly separated from petiolar area; legs very slender; stigma less 

 than half as wide as long, but with radius distinctly beyond middle; 



