446 PROCEEDINGS OF THE NATIONAL MUSEUM vol. no 



Agrothereutes grapholithae (Uchida) differs from the species illus- 

 trated (fig. 26a) in that there is but one median expansion of the 

 labral sclerite and there are eight large setae on the labrum instead 

 of six. 



The following are figured in the literature : Cryptus inornatus Pratt 

 (Simmonds, 1948), C. laborator laborator (Thunberb) (Beirne, 1941), 

 C. sexannulatus Gravenhorst (Rosenberg, 1934), Agrothereutes abhrevi- 

 ator (Fabricius) (Morris, Cameron, and Jepson, 1937), A. batavus 

 Vollenhovon (Rosenberg, 1934), Ischnus polytomi (Tschek) (Morris, 

 Cameron, and Jepson, 1937), Echthrus reluctator (Linnaeus) (Bau- 

 mann, 1933). 



Subfamily Ickneumoninae (= Joppinae, =Phaeogeninae) 



Figures 28-37 



This is a very distinct and uniform subfamily whose members are 

 internal parasites of the Lepidoptera. They oviposit in the host larva 

 or pupa but always emerge from the pupa. 



The epistoma is lightly to heavily sclerotized and the pleurostoma 

 and hypostoma are always well sclerotized; sclerotized areas may be 

 present lateral and dorsal to the pleurostoma and epistoma and, to a 

 more limited extent, the hypostoma; sensilla are frequently present 

 on the epistoma and pleurostoma; the hypostomal spur and stipital 

 sclerite are absent; the labial sclerite is usually absent but may some- 

 times be seen as a very lightly sclerotized strip at the edge of the pre- 

 labial area ; each maxillary and labial palp is in the form of a flattened 

 disc bearing several sensilla, usually about five to each palp; the silk 

 press is lightly sclerotized and two small sensilla are present ventral 

 to the press; the prelabial sclerite is absent; groups of setae and sensilla 

 are situated on the clypeolabral area, often on lightly sclerotized 

 plates the shape of which is often characteristic of a genus ; the mandi- 

 bles are large and well sclerotized and do not have teeth on the blade; 

 the antenna is disc-shaped; the spiracle has an oval atrium, and the 

 large, thiclc-walled closing apparatus adjoins the atrium; the skin is 

 smooth with small setae and no spines. 



Larval Key 



1. Hypostoma sharply bent Trogini 



Hypostoma may be curved but never sharply bent 2 



2. Mandible broad and length of blade is equal to or less than one-third length 



of mandible Listrodromini 



Mandible less broad and length of blade is more than one-third length of 

 mandible 3 



