550 THE PUB SEALS OF THE PEIBILOF ISLANDS 



II. HYMENOPTEEA. 



Family CHALCIDIDAE. 

 Tridymus capreae L.' 



One specimen found in vial with ticks and lice found on the fur seal (Barrett- 

 Hamilton). This is a common North European species and is parasitic in dipterous 

 galls on willow. 



Family ICHNEUMONIDAE. 

 EzolytuB sp.' 



Pour specimens were collected by Mr. Barrett- Hamilton on St. Paul Island. 



Fezomachns sp.' 



Two specimens from St. Paul Island collected by Mr. Barrett-Hamilton. 



Family APIDAE. 



Mr. Elliott (Report on the Seal Islands of Alaska, p. 12) says: "The, to our eyes, 

 familiar form of the bumblebee, Bombus borealis, passing from flower to flower, was 

 rarely seen; but a few are resident here." The determination must be considered 

 doubtful and the species may possibly be the B. gelidus Oresson, which has been 

 described from the Aleutian Islands. It is possible, also, that several species of 

 Bombus may occur on the Pribilof Islands. 



III. LEPIDOPTERA. 



Suboraer LEPIDOPTERA RHOPALOCERA. 



No species of this suborder seem to be recorded from Pribilof Islands and none 

 were among the collections transmitted to the Museum, but Mr. Elliott (1. c.) remarks 

 that "a very few species of butterflies, principally the yellow Nymphalidae, are 

 represented by numerous individuals." The yellow butterflies referred to are unques- 

 tionably Papilionids of the genus Colias, several species of which are recorded from 

 Alaska, viz, G. hecla Lef., C. palaeno Linn., G. chippewa Edw. The last named species 

 is almost sure to occur on the Pribilof Islands. 



Suborder LEPIDOPTERA HETEROCERA. 



None are recorded from the islands, though various families are undoubtedly rep- 

 resented. The Museum possesses only two specimens of an undetermined Arctiid 

 larva collected by Barrett- Hamilton on St. Paul Island. 



IV. Order DIPTERA. 



No species have hitherto been described from the Pribilof Islands, but Mr. Elliott 

 (1. c.) records some interesting notes on Diptera which are incorporated in the fol- 

 lowing list. Nine species of this order (besides a single larva) were collected by 

 Mr. Barrett-Hamilton on St. Paul Island and have been determined by Mr. D. W. 

 Coquillett. 



' Determined by Mr. William H. Ashmead. 



