422 HYME3ST0PTEKA. 



from the Evaniida?. Pelecinus does not appear to me to have a very near relationship 

 with it, and, among other differences, it has the trochanters one-jointed. 



l. Monomachus ruficeps. (Tab. XVIII. fig. 6, $ .) 



Niger, eapite, pleuris pedibusque rufo-testaceis ; alis fere hyalinis, apice fumatis. $ . 

 Long. 22 millim. (abdomine 16 millim.) ; anteimse 10 millim. 



Hab. Panama, Volcan de Chiriqui 2500 to 4000 feet (Champion). 



Antennae scarcely half the length of the body ; scape smooth, shining, glabrous ; 

 flagellum microscopically pilose, its basal and middle joints a little dilated at the apex ; 

 the third joint scarcely so long as the fourth. Face closely and rather strongly punc- 

 tured, not so shining as the vertex, which is only punctured above the outer ocelli, and 

 there not strongly ; the front strongly punctured. The orbits are scarcely punctured ; 

 the face bears rather long sparse white hair ; the ocelli are in a black patch ; the tips 

 of the mandibles are black. Thorax shining, the pleurae sparsely pilose ; the meta- 

 thorax punctured, laterally more closely than above. The sides of the scutellum are 

 finely rugose. The prothorax is a little broader than long, and bulges out a little at 

 the sides ; the parapsidal furrows are complete, narrow, but deep. The petiole is nearly 

 cylindrical, bent downwards in the middle, and shorter than the third segment, the latter 

 being longer than the second segment. The coxae are shining, impunctate, and for 

 the greater part black above ; the femora are sparsely, the tibiae and tarsi more closely 

 and densely pilose. The metatarsus is nearly double the length of the second joint ; 

 the spurs short and thick. The ventral part of the abdomen is more or less testaceous ; 

 there is a black splash over the fore coxae ; and the hinder edge of the metapleurae, 

 the scutellum above, and the pronotum in front are black. 



What appears to be a variety has the scape of the antennae and the petiole obscure 

 testaceous ; the coxae without any black ; and the thorax black obscured with testaceous 

 in front. 



Pam. EVANIID2E. 



In this family I place only the genera which have the abdomen inserted in the top 

 of the metathorax. 



Subfam. ATJLACINM. 



From the next subfamily the " Aulacinae " may be known by the anterior wings 

 having two recurrent nervures, and by the antennae issuing from a little above the base 

 of the clypeus. 



