130 ASHMEAD 



Aphididae, by Theo. Pergande. In studying the remaining un- 

 worked material I have here followed my usual plan, and shall 

 give a complete list of all the species in the suborder Homoptera 

 now known to occur in Alaska, arranged in systematic order. 

 In all, twenty-four species are known in this suborder, ar- 

 ranged under five families and thirteen genera. Of the species, 

 four have a wide distribution in Europe and North America, 

 namely, Enacanthus acuminatus (Fabr.), Deltoccfhalus abdomi- 

 nalis (Fabr.), Cicadida seoenotata (Fallen), and C. fasciijrons 

 (Stal), and will ultimately be found to occur in northern Asia. 

 Cicadula lata (Uhler) occurs in Colorado and Labrador. 



SYSTEMATIC ACCOUNT. 



Order RHYNCHOTA. 



Suborder Homoptera. 



Superfamily FULGOROIDEA Ashmead. 1 



Family DELPHACID.E. 



Genus Delphax Fabricius. 



DELPHAX STEJNEGERI Ashmead. 



Delphax stejnegeri Ashm., Fur Seals and Fur Seal Isl., iv, 340, 1899. 



Type.— Cat. No. 4046, U. S. Nat. Mus., from Pribilof Islands, 

 Bering Sea. Additional specimens from Metlakatla, June 4 ; Popof 

 Island, Shumagin Islands, July S ; Farragut Bay, June 5. 



This species was originally described from a single female specimen 

 taken by Dr. L. Stejneger on Bering Island. Several specimens were 

 taken by the Harriman Expedition, among which are two brachyp- 

 terous males that differ from the female as follows : 



Length 2.4 mm. The face, except the frontal and the clypeal carina?, 

 the scutellum, except the carinae and the extreme lateral and posterior 

 margins, the depressions on the sides of the pronotum, the mesopleura, 

 except laterally and the sutures, the mesonotum, most of the coxae and 

 most of the abdomen, except the first and second sutures and some- 

 times the extreme lateral margins of dorsal segments, the extreme 

 upper edges of the pygofers and the circular disk, surrounding the 

 cerci, which are pale yellowish, are black ; otherwise, except in the 

 usual sexual difference, it agrees with the female. 



1 The Superfamily Cicadoidea is not yet reported from Alaska, but undoubtedly has 

 representatives in the interior. 



