16 PROCEEDINGS OF THE NATIONAL MUSEUM vol. 79: art. 16 



MICROBRACON CRYPTORHYNCHI, new species 



Most similar to hysJopl Viereck but differs especially in the longer 

 radial cell, which practically attains wing apex, the unicoloroiis dark 

 brown stigma, the entirel}^ black mesonotnm, and the yellow legs. 



Female. — Length, 4 mm. Head transverse, not very prominent at 

 insertion of antennae, fully as wide as thorax; face very delicately 

 granular and subopaque, smooth medially; frons and vertex smooth 

 and shining; transverse diameter of mouth opening somewhat greater 

 than distance from the opening to the ej^es ; antennae of type slender, 

 not so long as the body, 33-segmented, all flagellar segments longer 

 than broad. Thorax moderately stout; mesoscutum and scutellmn 

 polished; notauli weak, lined with sparse hairs; propodeum polished, 

 with only a very short stub of a median ridge at 'apex and a few 

 short rugae radiating from this ; second abscissa of radius more than 

 twice the first: the third as long as the first and second combined, 

 and as long as last abscissa of cubitus ; radial cell going practically to 

 apex of wing. Abdomen stout, longer than thorax ; first tergite finely 

 rugulose ; second tergite as long as the third, finely though not closely 

 punctato-granular, except along posterior margin where it is smooth ; 

 second suture not broad, practically straight; third and following 

 tergites polished; ovipositor sheaths about as long as the abdomen. 

 Head and thorax entirely black; all legs testaceous, with only middle 

 and posterior coxae blackish above at base; wings hyaline; abdomen 

 brownish testaceous; the first tergite and a small triangular basal 

 median spot on second, black. 



Male. — Essential characters as in the female, except that antennae 

 are 32-segmented, the first and second abdominal tergites are more 

 weakly sculptured, and the fourth and following tergites are black. 



The number of segments in the antennae of the female paratypes 

 varies from 30 to 33 with only 26 in one unusually small specimen, 

 and in the case of the males from 32 to 34. The male paratypes agree 

 with the allotype in having the abdomen beyond third tergite black ; 

 in the females, this part of the abdomen varies from entirely brownish 

 testaceous to entirely black. 



rype.— U.S.N.M. No. 42877, from Melrose Highlands, Mass. 



Host. — Crypforhynchus Japathi Linnaeus. 



Twelve females and six males reared by J. V. Schaffner, jr., in 

 May, June, and July, 1924. under Gipsv Moth Laboratory No. 

 12164 J5. 



U. S. SOVERNMENT PRINTINS OFFICE: I9SI 



