1908] GIRAULT — ENCARSIA VERSICOLOR 57 



Nearest to Encarsia townsendi Howard, and coquilletti Howard, but easily dis- 

 tinguished from the two species by antennal and tarsal characters, color of the eyes 

 and body, the carinae on the vertex, and the naked spot on the wings; distinct from 

 all other species by specific structural characters, agreeing, however with quaintancci 

 Howard and pergandiella Howard in having a naked area on the wings. The most 

 striking characters of this species are the cephalic carinjie, the naked spot on the 

 wings, the slightly dusky basal half of the wings, the peculiar coloration of the eyes 

 and ocelli, and the contrasting colors of the male. 



Types: — 9 females, 5 males, in collection Illinois State liaboratory of Natural 

 History (Accession, No. 37474); cotypes: 4 females, 1 male, in collection Milwaukee 

 Public Museum, (No. oW^t); and cotype No. 11704, United States National Museum 

 Washington, D. C, 3 males, 3 females. All balsam mounts. 



Hosts parasitized by this species become blue-black at least by the time of the 

 pupation of the parasite. The latter emerges from a small round hole in the cephalic 

 portion of the thorax dorsad, and is solitary, the parasitic pupa filling nearly the 

 entire cavity of its host. The parasite was exceedingly abundant during March, 

 1908, in one greenhouse and the percentage of parasitism was at least as high as. 

 forty percent; its habits appear to be similar to those of the Aphelininae in general. 



