SOME PARASITIC HYMENOPTERA FROM BAJA 

 CALIFORNIA AND TEPIC, MEXICO. 



BY WILLIAM H. ASHMEAD. 



Through the kindness of Mr. Wm. J. Fox, of the 

 Philadelphia Academy of Sciences, I have been enabled 

 to examine and report upon another interesting collection 

 of parasitic Hymenoptera, made in Baja California and 

 Mexico, in the fall of 1894, ^J Messrs. Eisen and Vaslit, 

 members of the California Academy of Sciences. 



The collection, although small in numbers, represents 

 thirty-eight distinct species, distributed in seven families, 

 and many of which, especially among the microscopic 

 forms, prove to be new to science, and are briefly char- 

 acterized below. 



Family PROCTOTRYPIDyE. 



Mesitius Spinola. 



I. Mesitius nigripilosus sp. n. 



? . — Length 4.5 mm. Black, shining, with sparse 

 black hairs, more especially apparent on the head and 

 the apical half of the abdomen. Scape, pedicel, man- 

 dibles and legs, except cox« and posterior femora, red- 

 dish yellow; palpi white; flagellum dark brown; wings 

 subfuscous, the veins brownish yellow. 



The head is scarcely longer than wide across the eyes, 

 alutaceously sculptured, with some sparse, shallow, 

 thimble-like punctures scattered over its surface. An- 

 tenna 13-jointed, filiform, tapering toward tips and ex- 

 tending a little beyond the tegulas ; the scape is obconical, 

 slightly curved, about four times as long as thick at apex, 

 while the flagellar joints are all longer than thick, aver- 

 aging from i^ to 2 times as long as wide. The pronotum 

 is long, subtrapezoidal, as long as the mesonotum and 



2d See., Vol. V. September 7, 1895. 



