202 HYMENOPTEKA. 



and body brighter in tint ; there is no black on the coxse, nor are the hind femora infuscate 

 towards the apex ; the black on the hind tibiae is only on the outer side ; and the 

 abdomen is broadly dilated laterally at the apex. 



EPIRHYSSA. 



Epirhyssa, Cresson, Hymen, of Cuba, p. 39. 



This genus agrees with Rhyssa in having the rnesonotum transversely striated, but is 

 sufficiently distinguished from it otherwise by the fore wings having no areolet. Two 

 species have been described from Cuba, and one is known from Japan. The clypeus at 

 the apex is incised, the incision, however, being very broad and truncated. 



1. Epirhyssa mexicana. (Tab. XI. fig. 2.) 



Epirhyssa mexicana, Cresson, Proc. Acad. Phil. 1873, p. 394 ( $ ) \ 



Hab. Mexico, Orizaba 1 , Cordova 1 (Sumichrast) ; Guatemala, San Geronimo (Cham- 

 pion). 



EPHIALTES. 



Ephialtes, Gravenhorst, Ichn. Europ. hi. p. 224. 



There are not many species of this genus known ; but it seems to be, if anything, 

 more numerously represented in the New than in the Old World. 



1. Ephialtes atriceps. 



Ephialtes atriceps, Cresson, Proc. Acad. Phil. 1873, "p. 394 ( ? ) \ 

 Hab. Mexico, Orizaba 1 ( Sumichrast). 



2. Ephialtes annulicornis. (Tab. XI. fig. 1.) 



Niger, flavo varius ; annulo flagello antennarum pedibusque flavis ; coxis posticis nigro maculatis ; alis flavo- 



fumatis, stigmate flavo. 

 Long. 20 millim. ; terebra 30 millim. 



Hab. Guatemala, San Isidro 1600 feet, San Geronimo (Champion) ; Panama, Volcan 

 de Chiriqui 2000 to 6000 feet (Champion). 



Antennae stoutish, as long as the metathorax and abdomen together, of nearly equal 

 thickness throughout, covered with microscopic pile, the scape more or less testaceous. 

 Head shining, impunctate, shortly pilose ; tips of the mandibles, a transverse line above 

 the antennse, a line across the vertex through the ocelli and the occiput, black. Thorax 

 yellowish testaceous ; three longish black lines on the rnesonotum ; the pleural sutures, 

 the apical half of the scutellum, the base of the metanotum, a triangular mark and an 

 oblique line down the side, black. Mesonotum obscurely punctured, the punctures 

 sometimes nearly obsolete ; sutures deep. In the centre of the metanotum are two 

 furrows in the form of a triangle, of which the narrow end is at the base ; this 



