8 PROCEEDINGS OF THE NATIONAL MUSEUM vol. 78 



2. POLYCYRTUS (CRYPTANURIDIMORPHA) CAPITATOR (Fabricius) Brulle. (New 



combination) 



fCryptus capitator Fabbicius, Syst. Piez., 1804, p. 82, female. 



Mesostenus i^Polycyrtus) capitator Brull:^, His. Nat. Ins., Hym., vol. 4, 



1846, p. 214, male. — Szepligeti, Ann. Mus. Nat Hung., vol. 14, 1916, pp. 



269, 274, female, male. 

 fPolycyrtus nigriventris Cameron, Timehii : Journ. Roy. Agr. and Conim. 



Soc. Brit Guiana, vol. 1, 1911, p. 168, female. 



Before me are three specimens (one female and two males) from 

 French Guiana received from the Paris Museum, which appear to 

 be the same as the species described under this name by Brulle. 

 Spinola's identification of capitator is not the same species as the type 

 nor is it the same as BruUe's, differing at least in having the face 

 laterally white and the propodeum posteriorly punctate. Assuming, 

 since Brulle makes no mention of the color, that the posterior femora 

 in his specimen are red, it differs in this respect from the type of 

 captitator, which has the femora black. This character is probably 

 not always specific. In this respect the Fabrician type resembles 

 more closely inca^ new species, and that species may prove to be 

 synonymous with capitator. 



Ichneumon cephalotor Thunberg, synonymized by Dalla Torre 

 with capitator is certainly not the same. It has the thorax black. 



The same type of coloration occurs in the typical subgenus, and it 

 may be that some or all of the forms referred to capitator really 

 belong there. 



Brulle's description of capitator and the description of nigri- 

 ventris are so exactly similar that it seems probable that the two are 

 the same. 



As here identified capitator has the following characters : 



Female. — ^Length 14 mm. 



Head in front view with vertex strongly concave, eyes comprising 

 nearly two-thirds total width of head at level of antennae, mouth 

 barely as broad as shortest width of face, malar space slightly con- 

 stricted just above base of mandible, hardly as long as basal width 

 of mandible; diameter of ocellus three-fourths ocell-ocular line and 

 twice postocellar line; frons deeply concave, horn long and rather 

 slender, a small round tubercle above its base; temples from above 

 concave, much less than half as long as short diameter of eye; oc- 

 cipital carina in side view convergent above with eye margin, not 

 more prominent at lower extremity than elsewhere; hypostonal 

 carinae contiguous to a point about opposite middle of malar space, 

 the flanking grooves not especially deep and not separated from the 

 cheeks b};^ a carina, first joint of flagellum about eight times as long 

 as its greatest thickness. Thorax polished, with a few weak punc- 



