167 



makes it ordinarily impossible for the parasites to reach any 

 hirge percentage of them. It is the other chiss (jf enemies, 

 those which attack the maggot stage, which give jn-omise of 

 1 icing of value in practical efforts to control these pests. The 

 insects described below are all of this type. In all of these 

 the egg is deposited in the maggot but the host is not tliereby 

 prevented from completing its growth and forming its pnpa- 

 i-inm. In all these forms the adult parasite emerges from the 

 puparium of the host. 



The African insects here described were found ,;nd smdicd 

 while travelling for the Hawaiian Board of Agriculture and 

 Forestry searching for enemies of fruit flies. My travels were 

 interrupted at Cape Town by an attack of nudarial fever and 

 the observations u])on dung Hy parasites were nuule while re- 

 (•u])ei-ating there. Some insects of simihir habits which have 

 accidentally entered the Hawaiian Islands and a Japanese 

 Iclmeumonid bred by Mr. ]\fuir similar to one of the African 

 insects studieil arc here described: 



ICHNEUMONIDAE, Cryptinae, Stilpnini. 



1. Atractodes Muiri n. sp. 



Radius arising a little beyond the middle of the stigma, areo'el open 

 at apex, eyes bare, second tergite without an impressed spiracnlar line. 



Length 8.5 mm., wing 6.5 mm. 



9 Black ; mandibles in the middle, second joint of trochanters, 

 femora, and tibiae (basal third of hind tibiae infuscate), and 2d-5th 

 abdominal segments rufous; wing base yellow; wing grayish hyaline, the 

 ncrvure infuscate. 



Head not as wide as thorax, about twice as liroad as long above, 

 nearly .square as seen from in front; eyes subparallel, a little divergent 

 below; malar space longer than tiie width of the base of the man- 

 dible ; genae broader below ; mandible punctured at base with the upper 

 tooth a little longer; clypeus a little shining, rather sparsely but dcfmitely 

 tinely punctured, the anterior margin rounded, narrowly depressed ; face 

 more opaque, protuberent in the middle above the clypeus with .strong 

 punctures separated by about their diameter, more .shining and more 

 sparsely punctured along the sides ; genae nearly bare above, shining, 

 with some .scattered punctures; front similar to tlie face but the pimc- 

 tures less impressed; vertex similar to the genae; ocelli in a low 

 triangle, lateral ocelli about equidistant from the eye margin and from 



