MIMESA. — PSEN. 1 39 



V'' 



7. Mimesa claviventris. (Tab. viil fig. 20, $ .) 



Nigra, basi antennarum rufa ; petiolo quam abdomea longiore ; segmento mediali aureo-hirto ; alis hyaliuis, 



longis, cellula radiali infascata. $ . 

 Long. 9 millim. 



Hah. Mexico, Xucumanatlan in Guerrero 7000 feet (H. H. Smith). 



Head coarsely punctured ; below the antenna? densely covered with a silvery pubes- 

 cence ; the front and vertex with a sparser pubescence ; the pubescence behind the 

 eyes inclining to golden ; the ocelli hardly forming a triangle, in pits, the posterior pair 

 united by a curved furrow, a furrow running down from the anterior one. Clypeus 

 convex, the apex broadly rounded. Thorax above coarsely, rugosely punctured; 

 median segment coarsely punctured, irregularly reticulated, the basal area irregularly 

 striolate, shining ; mesopleurae finely punctured, densely covered with a silvery pubes- 

 cence. Petiole curved, as long as the rest of the abdomen; pygidial area shining, 

 stoutly keeled down the centre, impunctate. Tibiae and tarsi appearing white through 

 the dense white pile which covers them ; the femora sparsely pubescent on the lower 

 side. Wings reaching to the apex of the abdomen, with a distinct smoky tint ; the 

 radial cellule dark fuscous ; the second cubital cellule rather elongate, about twice 

 the length of the third ; the first recurrent nervure received in the basal third of the 

 cellule, the second shortly before the transverse nervure, the space between the two 

 being somewhat less than the top of the cellule. 



PSEN. 



Psen, Latreille, Precis des caract. gen. des Ins. p. 122 (1796). 



In the only species from our region the two hinder tibial spurs are of about equal 

 thickness, the second recurrent nervure is received in the third cubital cellule, and 

 the transverse median nervure is interstitial. In the generic definitions the stigma in 

 Psen is said to be " broad," and that of Mimesa " slender ;" but in P. annulipes it is 

 not broader than in the species I have placed under Mimesa. 



^ 1. Psen annulipes. (Tab. VIII. fig. 21, $ .) 



Niger, nitidus, facie et clypeo aureo-hirtis ; basi tarsorum albida ; alis violaceo-fumatis, stigmate fulvo. $ . 

 Long. 11-12 millim. 



Hob. Mexico, Amula 6000 feet, Kincon 2800 feet, Chilpancingo 4600 feer, all in 

 Guerrero, Teapa in Tabasco (H. H. Smith). 



Eyes slightly converging beneath. Ocelli almost forming a triangle. Head shining, 

 sharply retreating behind the eyes ; the occiput margined ; the vertex and front 

 sparsely haired ; the face covered with long golden hair ; clypeus convex, the apex 

 transverse; ocellar region raised. Antennae short, stout; the third joint fully one 



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