[361] THE TENTHREDINOIDEA IOI 



Specimens of a Tenthredinid taken at Unalaska and at other points 

 in Alaska agree very perfectly with the description given of Ten- 

 thrcdo nigrofasciata. If this conclusion is correct then Eschscholtz's 

 species must have been a Pachyprotasis, to which genus the species 

 above referred to belongs. On further investigation it was found that 

 this Alaska Pachyprotasis is specifically the same as Pachyprotasis 

 omega Norton, which is known to occur throughout the greater part 

 of the United States and Canada, and is recorded from the Pacific 

 coast, Labrador, and Saskatchewan. 



Six specimens, Unalaska, August 24; Popof Island, July 13; 

 Unga Island, July 21 ; Virgin Bay, June 26. 



MACROPHYA OREGONA. 



Macrophya oregona CRESSON, Trans. Am. Ent. Soc., vin, p. 19, 1880. 



One specimen, Salclovia, July 21. This species was described from 

 Oregon, but is also found in Washington. 



TENTHREDO FERRUGINEIPES. 



Tenthredo ferrugineipes CRESSON, Trans. Am. Ent. Soc., vin, p. 22, 1880. 



This is one of the commonest of the Alaska Tenthredos, and is 

 represented in the collection by some fifty specimens, from almost 

 every locality touched at, including Sitka, Virgin Bay, Saldovia, 

 Kadiak, Kukak Bay, and Popof Island. It was originally described 

 from Colorado, but it is known to be widely distributed on the Pacific 

 coast and in British America. Males and females were about equally 

 abundant; the former differ considerably from the opposite sex in 

 shape, which is as usual much narrower, and in coloration ; the abdo- 

 men is bright red in the middle but the basal plates and the three 

 apical segments are black. 



TENTHREDO VARIPICTA. 



Tenthredo varipicta NORTON, Trans. Am. Ent. Soc., n, p. 234, 1868. 



This species is also widely distributed and abundant and is gener- 

 ally found in company with the preceding. The fifty specimens in the 

 collection were taken at Fox Point, Berg Bay, Sitka, Yakutat, Sal- 

 dovia, Kadiak, Kukak Bay, and Popof Island. The male differs con- 

 siderably from the female in coloration ; the abdomen in the former 

 sex is reddish yellow above with black markings on the basal plates 

 and first segment, the venter of the abdomen is white at base, becom- 

 ing reddish towards tip, and the pectus is yellowish white. 



