Vol. IX] COLE & LOVETT—NEIV OREGON DIPTERA 253 



noto-pleurals ; upper edge of mesopleura blackish, in most part golden pol 

 linose and with a few ihairs ; one strong spine on upper posterior corner of 

 mesopleura; halteres yellow; scutellum reddish, shining, the apical half 

 black ; four scutellar bristles. 



Abdomen brown, the most of first segment shining reddish brown ; ovi- 

 positor wide, flat, amber colored; the rest of the abdomen brownish pol- 

 linose, gray toward base of segments; venter varied, brownish and blackish; 

 dorsum of abdomen with short, black, tihick set pile. 



Legs brownish yellow, the tarsi darker. The wings are brown with 

 oblique hyaline stripes (Fig. 28a) ; the outer stripe running from end of 

 first vein to wing margin in center of second posterior cell ; whole anal 

 angle of wing hyaline. Longitudinal veins and cross-veins sinuous. 



Holotype (No. 511), female, in tlie Museum of the Cali- 

 fornia Academy of Sciences, collected at Warm Springs Val- 

 ley, Ore., July 7. 1906. Collector unknown. From material 

 in the Oregon Agricultural College. 



This species is not typical in the form of the abdomen or 

 general appearance. The head is shaped as in T. ftcxa and T. 

 cuneata. The wing markings are quite different from the de- 

 scribed species. Dr. Aldrich corroborated my determination 

 of this species. 



43. Aricia bicolorata Malloch, new species 



Female : Yellow, slightly shining ; head brownish fuscous ; second an- 

 tennal joint yellowish testaceous; palpi and third antennal joint black; 

 abdomen and tarsi fuscous; wings clear, veins yellow basally; cross-veins 

 very slightly browned ; halteres yellow. 



Eyes bare, facets of almost uniform size ; frons at vertex a little over one- 

 third of the head-width ; orbits each with five or six bristles and a few 

 weak hairs ; antennse nearly as long as face ; arista with the longest hairs 

 nearly as long as width of third antennal joint; palpi slender; cheek about 

 one-fourth as high as eye. with a series of strong marginal bristles and some 

 short, weak hairs above them; presutural acrostichals four-rowed short and 

 weak; postsutural dorso-centrals three; prealer short; stemopleurals 1:2; 

 hypopleura bare ; third and fourth tergites with strong discal and marginal 

 bristles ; fore tibia with a median posterior bristle ; mid tibia with three or 

 four posterior bristles ; hind tibia with two antero-ventral and two antero- 

 dorsal bristles ; fore tarsus slender, longer than fore tibia ; costal thorn 

 long ; outer cross-vein slightly curved ; veins three and four divergent at 

 apices. 



Length, 6-6.5 mm. 



Type, Hood River, Ore., June 21, 1917 (F. R. Cole). Para- 

 type, Washington State (Kincaid). 



Paratype in collection of Illinois State Natural History 

 Survey. 



This species is readily distinguished from its allies by the 

 colors of the body. 



