PAKASITIC IIY.MI.Nol'TlCKA. 219 



ImvinEr the shortest jiedicel ; diih •J-jointed : uxilhe iiieetinfr at base of seutelluni, 

 luterally tovrards base of wing siiiootli ami shiniiifr with some fine aciculiitioiis ; 

 petiole stout, shagreened, a little thicker at base than at apex, about three times 

 as long as thick ; body of abdomen subglohose, Jiiglily convexly elevated dorsally, 

 the apical scguieuts retracted within the large fourth segment. 



Hab. — Roslyii, Va. 



Der^cribed from two ? and one <? specimens, bred by Mr. Frank 

 H. ("liittenden from the larvaof a beetle, Tylodermu foceokdnin Say. 



IKOSO.MA Walker. 

 IsOKOiiia abnoriiie sji. n. 



9. — Length ."5 :5.."» mm. Hlack, umbilicate-iiunetate : scape, trochanters, knees 

 and all tibiie and tarsi brownish yellow; tlagellum rather thick, brown, (>-jointed, 

 the first .joint a little shorter than the club, the following sube((ual. about two 

 and oue-half times as long as thick ; pronotum about two and three-fourths times 

 wider than long, without pale spots on the anterior angles; mesonotum only two- 

 thirds the length of the scutellum ; metanotum about as long as the scutellum 

 with a distinct median impression. Wings hyaline, the veins yellowish, the mar- 

 ginal vein about one-half longer than the stigmal, the latter a little shorter than 

 the postmarginal. with a poorly defined uncus issuing from its extreme tip supe- 

 riorly. Abdomen with petiole a little longer than the head and thorax iniited. 

 compressed, the body dorsally at base, convexly elevated, the tip acute, curving 

 upwards, the petiole is rather slender, shagreened and nearly, or quite, as long 

 as the hind coxa?, the fourth, fifth and seventh segments dorsally are about of an 

 eijual length, but the fifth centrally is much longer. 



Hab. — Riley County, Kansas, and Texas. 



Of this s})ecies, which is not a true Isosomu, I have seen but two 

 specimens: one in my collection, received .«ome years ayo from Mr. 

 C. L. Marlatt, collected by him at Manhattan, Kans., and another 

 in the National Museum labeled " Texas." 



.MKRAI>OKIJS Walker. 

 .lIera|>orii!« tliibiii»i sp. n. 



9 . Length 1.8 2 mm. Aeneous-black, punctate, the upper part of thorax 

 and tem])les more decidedly metallic; scai)e and legs, except coxai, brownish 

 yellow, the tarei a little paler: flagelluni seneous-black, pubescent. Wings hyaline, 

 the veins i)ale, the subcostal being almost white and nearly three times as long as 

 the marginal vein, the latter only »■ little longer than the stigma. The head is a 

 little more than three times as wide as thick, antero-posteriorly. the o(rci})Ut deli- 

 cately margined, the cheeks a little rounded. The thorax has the j)Hra])si<lal 

 furrows distinct half the length of the mesonotum anteriorly, or a little more: 

 metanotum strongly punctate produced into a subglobose neck and tricMirinate, 

 the middle carina extending only to the base of the neck, the lateral folds strongly 

 curved. The abdomen is ovate, shorter than the thorax, flat above, convex or 

 strongly carinate beneath, the second segment the longest, occujiying a little more 

 than one-third its surface, with a large fovea at base above, the third segment is 

 about one-third the length of the first, the fourth, fifth and sixth segments are 

 very short, subequal and united are shorter than the third, the seventh .segment 

 is as long as the third, while the eighth is visible as a slight conical point. 



TKANS. AM. KNT. SOC. XXIII. JUNK, 1896. 



