16 BULLETIN" 123, UI^ITED STATES E^ATIOFAL MUSEUM. 



2. RHYACIONIA NEOMEXICANA (Dyar). 



(Fig. 46.) 



Evetria neomexicana Dyak, Proc. Ent. Soc. Wash., vol. 5, 1903, p. 286. — Baenes 



and McDuNNOUGH, Check List Lepid. Bor. Amer., no. 6764, 1917. 

 .Semasia offectalis Oockerell (not Hulst), Ent. News, vol. 12, 1901, p. 317. 



This is the principal native bud moth on the western yellow pines 

 in the Southwest. It is of great economic importance and in New 

 Mexico and Arizona does great damage to the trees. The life his- 

 tory has been worked out by Mr. J. H. Pollock, of the United States 

 Bureau of Entomology. According to his notes the species has one 

 generation a year, the adults emerging from April 12 to 23, laying 

 their eggs on the inner side near the base of the needles. In from 

 thirty-nine to forty-six days the eggs hatch, the larvae bore into the 

 buds down into the stems of the new shoots, killing them, and when 

 they have exhausted the food in one, passing to another and repeat- 

 ing the process. Larval development is completed by July 15, at 

 which time the caterpillars leave the twigs and enter the ground, at 

 the base of the tree, spin a thin cocoon and pupate. By August 1 all 

 the brood have pupated and in this stage they overwinter. 



Male genitalia figured from specimen in National Collection from 

 Flagstaff, Arizona (Hopk. U. S. no. 13962&, C. F. Kostian, collector, 

 June 29, 1916). 



Distribution according to specimens in National Collection, Ameri- 

 can Museum and collection Barnes : New Mexico, Arizona, southern 

 Colorado. 



Alar expanse. — 19-28 mm. 



Type. — In National Collection. 



Type locality. — Las Vegas, New Mexico. 



Food plant. — Pinus ponderosa, P. scopulorum. 



3. RHYACIONIA PASADENANA (Kearfott). 



(Fig. 50.) 



Evetria pasadenana Kearfott, Trans. Amer. Ent. Soc, vol. 33, 1907, p. 3.- 

 Babnes and McDunnough, Check List Lepid. Bor. Amer., no. 6771, 1917. 



This is the species that has been recorded by Walsingham and 

 others as the European E. duplana Hiibner. The true duplana does 

 not occur in our fauna. We have two specimens in the United States 

 National Museum reared from buds of pine (species not specified), 

 one of which had been seen by Walsingham and labeled " dupla^ia 

 Hiibner." 



Male genitala figured from reared specimen in national collection 

 from California (exact locality not specified). 



