150 E. T. CRESSON, 



C0XS8, al] the trochanters, tips of four anterior femora, all the tibite (except 

 apices of posterior pair which are black), and all their tarsi (except tips of in- 

 termediate pair which are pale brown and of posterior pair which are black), 

 pale yellowish-white; wings hyaline, iridescent, nervures and stigma black, 

 the latter large and with a pale dot at base; abdomen densely and minutely 

 rugulose, with apical margins of segments smooth, lateral swellings prominent ,- 

 first segment deeply grooved at base; scutellum rufo-piceous; metathorax 

 with a central longitudinal channel ; antennae pale brown. Length 8 lines. 



Hah. — Beverly, Mass. This beautiful little species is respectfully 

 dedicated to luy friend Mr. Edward Burgess, of Boston, to whom 

 science is indebted for the discovery of many gems in Hymenoptera. 



3. Polysphincta limata, n. sp. — J .^-Black, polished, impunetured; palpi, 

 tegulse and dot before, white; mandibles rufo-testaceous ; antennae nearly as 

 long as body, slender, brown ; scutellum and postscutellum rufous, the former 

 blackish on disk ; wings hyaline, iridescent, nervures and stigma brown ; legs 

 slender, yellowish-red ; tips of anterior coxse, all the trochanters, and more or 

 less of four anterior tibiae, pale yellowish ; four posterior tarsi whitish, with the 

 joints tipped with black; posterior tibiae as in iexana ; tips of posterior femora 

 blackish ; metathorax with a rather deep, central, longitudinal channel ; ab- 

 domen polished, impunetured, finely and sparsely pubescent, lateral swellings 

 prominent, deeply grooved above, the groove converging to apex; ovipositor 

 scarcely half the length of abdomen. Length 4 lines. 



Var. 9 • — Scutellum and pleura pale rufous ; the sub-basal black spot on jios- 

 terior tibiae wanting. 



JIah. — 3Iassachusetts; New Jersey. Readily distinguished by the 



polished, impunetured abdomen. 



CLISTOPYGA, Grav. 

 Clistopyga annulipes, n. sp. — J. — Black, shining; anterior orbits, extend- ' 

 ing slightly beyond summit of eyes, a transverse spot beneath insertion of each 

 antenna and confluent with orbital line, clypeus entirely, mandibles except 

 tips, spot beneath each eye, palpi, tegulae, line before, spot beneath, tip of scu- 

 tellum, sjJot on postscutellum, and very narrow apical margin of abdominal 

 segments, white; remainder of scutellum pale rufous; wings hyaline, nervures 

 and stigma piceous; legs pale ferruginous, four anterior coxae and anterior legs 

 in front, pale yellowish ; four posterior tibiae and tarsi black or blackish, the 

 tibiae with a narrow, white annulus about the middle, and the tarsal joints 

 more or less white at base; antennae long, slender, black above, brown be- 

 neath ; pleura very finely and sparsely punctured ; metathorax convex, with 

 short, fine, pale glittering pubescence laterally, upper surface minutely trans- 

 versely aciculated ; legs short, subrobust, posterior tibiae scarcely longer than 

 the two basal joints of their tarsi ; abdomen long, subrobust, convex, surface 

 even, shining, finely and closely punctured, and with short, fine, erect jjubes- 

 ence; first segment excavated at base; apical segment truncate; ovipositor 

 not half the length of abdomen, sheaths with long pubescence. Length SJ 

 lines. 



Hah. — Massachusetts. One specimen with the mesothorax almost 

 entirely destroyed. 



