NORTH AMERICAN EUCOSMINAE. 19 



penis. In montana these are very short and stout and form a cluster 

 of a dozen or more set very close together. 



Male genitalia figured from type. 



Alar expanse. — 19 mm. 



Type. — In National Collection. 



Type locality. — Elliston, Montana. 



Food plant. — Pinus contorta. 



7. RHYACIONIA RIGIDANA (Fernaid). 

 (Fig. 49.) 



Retinia rigidana Fern'ald, Rept. U. S. Dept. Agr. for 1879, 1880, p. 237. — 



Packaed, Fifth Rept., U. S. Ent. Com., 1890, p. 754. 

 Evetria rigidana Feknald, in Dyar List N. Amer. Lepld., no. 4999, 1903. — 



Barnes and McDunnough, Check List Lepid. Bor. Amer., no. 6761, 1917. 



For many years this species had not been represented in our col- 

 lections, and as far as I know has not been recorded in our economic 

 literature since Packard's citation of the original description and 

 notes of Fernaid and Comstock. I have several times in recent years 

 reared the moth from larvae feeding in the buds of various pines 

 also infested with the larvae of the Nantucket pine moth, E. frus- 

 trana Comstock. The two species occur together, have the same 

 habits, and are probably confused in the economic references to 

 frustrana. Fernald's species, however, seems to be more local. 

 While its distribution in the East probably corresponds roughly to 

 that of frustrana^ it is to be found only in localities here and there 

 and does not seem to be very common anywhere. The larvae of the 

 two have never been satisfactorily differentiated and the complete 

 life history of rigidana remains to be worked out. It has two gen- 

 erations a year (like frustrana)^ the moths issuing in March and 

 April and again in late June and early July. It overwinters in the 

 buds as pupa. 



Male genitalia figured from specimen in National Collection from 

 Staunton, Virginia (reared April 7, 1917 under Hopk. U. S. no. 

 13975a from larva in bud of Pinus taeda., J. J. de Gryse, collector.) 



Distribution according to specimens in National Collection, Ameri- 

 can Museum, and collection Barnes : Virginia, West Virginia, North 

 Carolina, New York. 



Alar expanse. — 14-18 mm. 



Type. — In collection Fernaid. 



Type locality. — Ithaca, New York. 



Food plants. — Pimis rigida.^ P. virginiana^ P. taeda., P. laricio, P. 

 ryVvestris. 



