OF WASHINGTON, VOLUME XIII, 1911. 161 



Pantel figures some of the types of colored armature in the 

 maggots of the present group, and calls attention to the simi- 

 larity of Steinidla, but it should be observed that the arma- 

 ture of the latter is not of the T 'arichcrta or Alicropalpns type. 

 Steiniella is approached in armature by Glancopluuia, both 

 possessing spined plates, but neither form falls in the present 

 group. 



The author questions whether the maggots of this group are 

 always deposited on plant surfaces, and not sometimes directly 

 on the host. The observations of Marchand are cited, who 

 claims to have observed Enpeletcria /era deposit maggots 

 on the host at the entrance of the spiracles. However this 

 may be, I can only say that the flies of Eudoromyia magm- 

 cornis which we handled at the Gipsy Moth Laboratory mani- 

 fested the greatest alarm when they found themselves in 

 close proximity to caterpillars, but deposited their maggots on 

 the leaves and stems in the general vicinity of the caterpillars, 

 though always at a respectable distance from them, and at 

 least in certain cases on the fresh silken strands left by them 

 in traversing the plant surface to and from their nests. The 

 caterpillars used were Hyphantria and Euproctis, which make 

 webbed nests. Both the alarm of the flies when brought face 

 to face with the hosts and the specialized armature of the mag- 

 gots indicate that larviposition on the host is abnormal. If 

 exceptional cases occur, each must be individually sought for 

 the reason. 



Group V. Species depositing naked maggots or maggots 

 in choria probably in the vicinity of the host. This is a most 

 instructive group, but a heterogeneous one. It is a collection 

 of extra-leaf-larvipositing forms with colored maggots. Five 

 genera are mentioned: Bio On ichceta, Erithorix (Olivierta}, 

 Glancophana, Macquartia, and Myiocera, the maggots of 

 none of which was before known to me, and all of which are 

 of the greatest interest as throwing important light on the 

 host relations of these forms. To these may be added 

 Ophirion, Stciiiiclla, Gymnochcrta, and Phasiopteryx. No 

 two of these nine genera probably fall in the same 'ultimate 

 natural group-unit, while two families and four subfamilies 

 are represented among them. All seem fitted to search for 

 their hosts in the open or subopen. 



Group VI. Species depositing naked maggots or maggots 

 in choria on the body of the host. Thirteen species are here 

 named, all having uncolored maggots, nevertheless forming a 

 heterogeneous assemblage. The author has evidently con- 

 sidered that these maggots, because they lack colored arma- 



