CLEAR-WING MOTHS OF FAMILY AEGERIinAE 167 



ALBUNA PYRAMIDALIS form BEUTENMt)LLERI Skinner 



Albuna beutenmiilleri Skinner, Ent. News, vol. 14, p. 126, 1903.— McDunnough, 

 Check list of the Lepidoptera of Canada and the United States of America, 

 pt. 2, No. 8791. 193Q. 



Male. — Antennae black, bipectinations from a rusty-brown base. Labial 

 palpi, head, and collar black. Thorax black, rusty brown at bases of hind- 

 wings. Abdomen usually wholly black and all segments narrowly ringed 

 with shiny steel blue, flat scales on posterior margin. In some examples 

 abdomen banded with very pale yellow or whitish, the bands broad on 

 segments 2 and 4 and narrow on posterior segments, above and beneath. 

 Legs entirely black. Wings bright red, narrowly margined with black. 

 Forewing with a narrow, elongated, translucent area before the discal 

 mark, divided by red veins into four parts ; behind the discal mark another 

 translucent area, narrowly triangular, terminating before wing base ; these 

 translucent areas covered with beautiful, very light greenish or bluish 

 opalescent scales ; base of wing, costa, cubitus, and margins black ; fringes 

 dull black. Hindwing bright red on outer two-thirds to a broad, irregular 

 translucent area before a black wing base ; a small round, translucent spot, 

 usually but not always present before the discal mark at costa; margins 

 and fringes dull black ; on the underside the bright red replaced by orange. 



Female. — Antennae simple. Otherwise as described for the male. 



Expanse : Male 22 to 24 mm., female 24 to 26 mm. 



Distribution. — Rocky Mountains, Colorado, Utah. 



Type. — Female. In the Academy of Natural Sciences of Philadelphia. 



Renmrks. — With the exception of one female captured in flight by the 

 writer on the foothills of Beaver City, Beaver County, Utah, 7,000 feet, 

 June 1904, the six or seven known examples all were collected by Tom 

 Spaulding at Stockton and Provo, Utah, during April and May 1901-1913. 

 Strikingly different in coloration, this form nevertheless shows no struc- 

 tural differences to warrant specific separation from pyramidalis. Field 

 investigations along the mountains bordering the Great Basin of Utah have 

 produced root-boring aegeriid larvae in species of evening-primrose 

 (Oenothera) under conditions similar to those under which rubescens 

 was obtained in Colorado. The difficult task of rearing the moths has not 

 yet been accomplished. When represented by adequate series of reared 

 examples transition forms will probably be found definitely connecting 

 rubescens with beutenmiilleri, the latter representing an extreme color 

 variation confined to Utah. 



ALBUNA FRAXINI (Ily. Edwards) 



Carmenta fraxini Hy. Edwards, Papilio, vol. 1, p. 185, 1881. — Pack.ard, 5lh Rep. 



U. S. Ent. Comm., p. 542, 1890. 

 Harmonia morrisoni Hv. Edwards, Papilio, vol. 2, p. 55, 1882. — Beutenmullkr, 



Bull. Amer. Mus. Nat. Hist., vol. 4, p. 171, 1892. 

 Parharmonla fraxini Beutenml-i.ler, Bull. Amer. Mus. Nat. Hist., vol. 6, p. 89, 



1894 ; vol. 8, p. 124, 1896. 



