Manchester Memoirs, Vol. xliii. (1899), No. 3. 193 



as the cellule itself ; its outer nervure is largely bullated 

 beneath ; the recurrent nervure is joined to it. The 

 coxae and trochanters are black ; the anterior pair 

 yellowish in front ; the hinder tarsi are spinose beneath. 

 Abdomen rufous ; the petiole except at the apex ; and 

 an interrupted mark near the base of the second segment, 

 black. 



Macrogaster. 



I believe I have correctly referred the following 

 species to Brulle's genus Macrogaster (Hymen, iv. p. 185 

 pi. 41 f 4), the type, and only known species, of which is 

 from the Cape of Good Hope. His generic description, 

 however, is very defective in some important points ; and 

 it is quite possible that our species may not belong really 

 to Macrogaster. He places Macrogaster next to Cryptus, 

 but the relationship of our species is undoubtedly with 

 the Pimplides. In neuration it agrees with Epirhyssa, to 

 which the species described by Smith {Proc. Linn. Soc. 

 Zool. 1857, p. T2i) is clearly congeneric ; but it differs in 

 the mesonotum not being striated, and in other respects. 

 The following are the salient generic characters of our 

 species.* 



Head large, not much dilated behind the eyes, which 

 are large, but do not reach to the base of the mandibles. 

 Face keeled in the middle ; clypeus rounded or with the 

 sides slightly oblique at the apex ; at the base not clearly 

 separated from the face. Mandibles with a large lower, 

 and a smaller upper, apical tooth. Antennae stout or 

 slender, but not so slender as in Pimpla or Rhyssa. 

 Thorax stout ; the mesonotum trilobate, the middle lobe 



*This genus has the alar neuration of Hemigaster, but in other respects 

 is very dissimilar, e.g., that genus has not the mesonotum trilobate; the 

 spiracles are received between the apej? and the middle of the petiole ; the 

 basal three segments of the abdomen are greatly enlarged, the head is 

 smaller, and the petiole bicarinate above. 



