366 ENTOMOLOGICAL NEWS. [Oct., '08 



of Aphelinus, with one exception, by the possession of hairy 

 eyes, and this character, taken in connection with its different 

 host relation, has suggested the advisability of erecting a new 

 genus to contain it and the allied forms that have since been 

 discovered. It also differs in its black color from the Coccid- 

 iiihabiting species. A single individual of an Aphelinus having 

 hairy eyes and being black except for the head and extremities 

 of the abdomen was collected by Koebele in the Santa Cruz 

 Mountains, California, and has been described by the author 

 (Technical Series No. i) as A. naviceps, the statement being 

 made at the same time that the species would probably ulti- 

 mately be found to be parasitic upon some Aphidid, this con- 

 clusion being reached from the prevalence of the dark color and 

 from the possession of hairy eyes. A. naviceps, however, has 

 never since been reared, and the accuracy of this theoretical 

 suggestion has not been proved or disproved. Comparatively 

 recently however two additional species have been reared from 

 Aphididae, which are also characterized by the possession of a 

 preponderance of black in the coloration and by eyes that are 

 hairy. These species, A. seminavus n. sp. and A. nigritns n. 

 sp. are described below. 



TABLE SEPARATING THE APHELINUS PARASITES 

 OF APHIDIDAE. 



FEMALES. 

 Eyes obviously hairy. 



Head black, base of abdomen yellow, hind femora pallid . mail Hald. 

 Head yellow, abdomen yellow at base and tip, all legs orange- 

 yellow flaviceps How. 



Head and abdomen entirely black iiigritus n. sp. 



Eyes obscurely hairy. 



Abdomen light yellowish, darker at margins, all legs yellowish or 

 slightly dusky seraiflavus n. sp. 



MALES. 



Third funicle joint twice as long as pedicel and six times as long as 

 broad ; club one-fourth longer than third funicle joint 



semiflavus n. sp. 



Third funicle joint very slightly longer than pedicel, and slightly 



more than three times as long as broad ; club rather more than 



twice as long as third funicle joint mail Hald- 



