134 HYMENOPTEEA. 



7. Philanthus hirticeps. 



Philanthocephalus hirticeps, Cam. antea, p. 87, Tab. VI. figg. 2,2a,b(j). 



4 8. Philanthus maculiceps. 



Philanthocephalus maculiceps, Cam. antea, p. 88, Tab. VI. figg. 3, 3 a {$). 



9. Philanthus gracilis. 



Philanthocephalus gracilis, Cam. antea, p. 88, Tab. VI. figg. 4, 4 a, & (tf). 



~-J 



Fam. MIMESID-ZE. 



This is a small group, represented by two or three genera of wide distribution, but, 

 so far as we know, of limited extent. Its chief peculiarities are:— The petiolated 

 abdomen, the petiole being smooth and generally furrowed ; the flagellum thickened 

 towards the apex; the middle tibiae with only one spur; and the wings with four 

 cubital cellules, the recurrent nervures being received either in the second or in the 

 second and third. The species are small, few of them exceeding 15 millim. in length, 

 and are entirely black, or black with yellow markings. 



MIMESA. 



Mimesa, Shuckard, Essay ou the Foss. Hymen, p. 228 (1837). 



The distinctions between Mimesa and Psen become so vague, as regards the neuration 

 of both the anterior and the posterior wings, that I can hardly regard them as distinct, 

 and am strongly inclined to the opinion that they should be united. It is, however, 

 possible that an examination of additional material from the tropics may reveal other 

 generic characters than those afforded by the alar neuration ; for the present, therefore, 

 as a matter of convenience, I retain the convential genera. In all our species the inner 

 spur of the hind tibia? is dilated. 



A. Petiole gradually dilated at the apex, not furrowed laterally, the dilated 

 part not abruptly separated from the rest. 



^ l. Mimesa mexicana. (Tab. VIII. fig. 15, ? .) 



Nigra ; capite et thorace pallide hirtis, aciculatis ; flagello antennarum subtus Mvo ; abdominis segmentis 



2° et 3° rufis ; alis hyalinis. $ . 

 Long. 8 millim. 



Ilab. Mexico, Milpas in Durango 5900 feet (Forrer). 



Eyes parallel, strongly faceted. Ocelli in a triangle. Clypeus convex, broadly 

 rounded, the margin depressed. Antennae stout, thickened towards the apex, covered 



