MONOGRAPH OF THE NORTH AMERICAN PROCTOTRYPID^. 113 



This extensive genus was very properly separated from Ceraphron 

 Jurme, by Prof. Westwood, as early as 1832. In 1856 Dr. Arnold Fors 

 ter again separated from it the genus Lygocerm, to contain those species 

 having bare eyes and serrate antenna^, in the males. The habits of the 

 two genera are identical, and their structural differences have been 

 sufficiently pointed out in my remarks under the genus Lygocerns. 



In 1888, 1 erected the genus JEimegaspilus for some wingless forms 

 which I now find are trae Megaspili. The name, however, is retained 

 for a closely allied apterous form, differing in several particulars from 

 Megasjnius. 



Our species are numerous, and may be distinguished by the follow- 

 ing synoptical table : 



TABLE OF SPECIES. 



FEMALES. 



1. Face very finely closely pnnctate or shagreened 2 



Face smooth, polished, iilipunetiired. 

 Apex of abdomen compressed, truncate, and gaping open, so that the valves of 

 the ovijjositor project. 

 Legs brownish-yellow ; antenna brown-black. 

 Pedicel shorter than the first flagellar joint ..M. axomaliventris, sp. nov 

 Pedicel as long as the first flagellar joint ; scape and pedicel pale. 



. ^ , 1 , M. PoPENOEi, sp. nov. 



Apex of abdomen normal. 



Legs brownish-yellow; antenna brown-black. 



Pedicel as long as the first flagellar joint M. ambiguus, sp. nov 



Pedicel much shorter than the first flagellar joint. 



Posterior tibi* with a brown streak above M. striatipes 



nov. 



2. Wings wanting or not fully developed 



Wings fully developed. 



Species shining. 

 Face finely shagreened or rugose. 

 Scape and legs pale brownish-yellow. 



Pedicel concolorous with flagellum M. SCHWARZI, sp. nov. 



Pedicel brownish- yellow. 

 Face rather coarsely rugose. 



Posterior coxa^ m.t black M. marylakdicus, sp. nov. 



Posterior cox,e and femora dusky M. Harringtoni Ashm. 



btignia piceous-black, wings subfuscous. 



Stigma brown, wings clear hyaline M. hyalinipennis, Ashm. 



Species opaque, the thorax sometimes subopaque. 

 Face closely finely puuctulate. 

 Hind coxfB black. 

 Scape, pedicel, and legs rufous, the posterior femora and tibiae fuscous ; 



pleura scaly-punctaie M. penmaricus, sp. nov. 



^•'^^P^- Petlicel, and legs brownish-yellow M. virginicus, sp. nov. 



3. Wings abbreviated and narrow, reaching not quite to the middle of the abdomen. 

 Scape, pedicel, first three flagellar joints, and legs, pale yellow. 



w;r,„o u- . , ^' OTTAWENSis Ashm. 



Wings reaching only to the tip of the petiole. 



AntenuiB brown-black, scape beneath and legs brownish-yellow. 



01 QC\n XT . r- ^ ^- CANADENSIS Ashm. 



21899 — ISTo. 45 8 



