HOMOPTERA 137 



Genus Psylla Geoffrey. 

 PSYLLA ALASKENSIS sp. nov. 



Female. Length to tip of abdomen 2.8 mm., to tip of wings about 

 5 mm. Greenish-yellow ; last four or five joints of antennas, especially 

 toward apex, more or less fuscous ; eyes green ; large spot on each side 

 of collar and the depressions and sutures of scutellum and metathorax 

 more or less fuscous ; median line on anterior lobe of mesonotum and 

 four lines on posterior lobe whitish. Wings pale greenish-hyaline, 

 immaculate, except a faint dusky shade toward the apices. 



Male. Length to tip of abdomen 1.8 mm., to tip of 

 wings less than 3 mm. Colored as in female, except 

 the antennal joints 3 to 6 are tipped with black, while 

 the wings are more distinctly dusky at apex. FIG. 9. Geni- 



Genitalia as in fig. 9. *f a . of Psylla 



' alaskensis. 



Type. Cat. No. 6274, U. S. Nat. Mus., from Popof 

 Island, Shumagin Ids., July 16. Additional specimens from Fox 

 Point, July 19; Seldovia, July 21. 



Superfamily APHIDOIDEA Ashmead. 



Family APHIDDXE. 

 Genus Nectarophora Koch. 



NECTAROPHORA CAUDATA Pergande. 



Nectarophora caudata PERGANDE, Proc. Wash. Acad. Sci., n, 513, ?, 1900. 

 Type. Cat. No. 5274, U. S. Nat. Mus., from Juneau. 

 NECTAROPHORA EPILOBII Pergande. 



Nectarophora epilobii PERGANDE, Proc. Wash. Acad. Sci., n, 515, $, 1900. 

 Type. Cat. No. 5276, U. S. Nat. Mus., from Popof Island, 

 Shumagin Ids. 



NECTAROPHORA INSULARIS Pergande. 



Nectarophora insularis PERGANDE, Proc. Wash. Acad. Sci., n, 515, $, 1900. 

 St. Paul Island, Bering Sea. 



Genus Cladobius Koch. 

 CLADOBIUS POPULENS (Kaltenbach). 



Aphis populens KALTENBACH, Monogr. d. Pflanzenl., I, 116, 1843. 

 Cladobius populens PERGANDE, Proc. Wash. Acad. Sci., n, 516, 1900. 



Superfamily COCCOIDEA Ashmead. 



No Coccid is yet reported from Alaska, although a species, probably 

 an Aspidiotus, is found on willows. 



