336 W. H. ASHMEAD. 



segments long, occupying most of the surface, the second the longest, 

 the segments after the third very short. 



Paracarotoinus ceplialotes sp. n. 



%. — Length 4 lum. Head aud thorax dull black, coiiflueutly punctate, the 

 lower part of face with some strise converging toward mouth ; mandibles, tegulfe 

 aud legs, except coxte, rufons or light rufous. Wings hyaline, the costal cell 

 broad ; abdomen seneous-black, smooth, the petiole opaque, finely shagreened. 



Hab. — Morgantown, AV. Va. 



This interesting addition to our genera of the Sphegujadrides was 

 captured by Prof. A. D. Hopkins in the sweeping net and confirms 

 an opinion which I have had for some time, i. e., that Thomson's 

 tribe Caratomides will not hold and must be conjoined to the Sphegi- 

 gastrides this new genus forming a connecting link between them. 



CYRTOGASTER Walker. 



C'yrtogaster liqueatus sp. n. 



'^. — Length 1.8 mm. Blue-black, punctate, with a slight aeneous tinge on the 

 thorax; metapleura and hind coxae bright metallic green ; scape, except at ex- 

 treme base and pedicel, submetallic brown ; flagellum brownish yellow, the 

 joints wider than long, Uuted ; legs brownish yellow. Head much wider than 

 the thorax a little more than three times as wide as thick antero-posteriorly, the 

 broad face bluish; mandibles rufous; palpi piceous, the dilated joint brownish. 

 Thorax with the pronotum distinct, about half the length of the mesonotum, the 

 latter with the parapsidal furrows indicated only anteriorly; scutellum not 

 wider than long, obconical, convex; metanotum smooth, with lateral folds and 

 a median carina. Wings hyaline, the tegulae piceous, the venation pale yellow- 

 ish, the marginal vein about twice as long as the stigmal, the postmarginal two- 

 thirds the length of the marginal. Abdomen small, oval, with a short, but dis- 

 tinct, finely punctate petiole ; first segment of the body occupying half its whole 

 surface, deeply emarginate above at base, the following segments short, subequal. 



Hal). — MorL-'antown, W. Va. Bred by Prof A. D. Hopkins from 

 PhlceosiiiHs dentatvs living in cedar. 



Tribe Pterovmlini. 



ROPTROCERIJS Eatzeburg. 



1844. — Pachyceras Ratzh. Die Ichn. d. Forstins. i, p. 217. 

 1848. — Roptrocerus Eatzb. 1. c. ii, p. 209; Forst. Hym.Stud. ii, 1856. p. 64 ; 

 Thomson, Hym. Scand. v, 1878. ji. 83. 



(Type Pachyceras xylophagoram Ratzb.) 



RoptroceiMUS xylopliasoriim Ratzb. 



Pachycerus xylophagonim Ratzb. Die Ichn. d. Fortius, i, p. 218. 

 Roptrocerus xylophagormi Eatzb. 1. c. ii, p. 209, taf. iii, f. 2. 



Hub. — Europe and Morgantown, AV. Va. 



