298 PROCEEDINGS OF THE NATIONAL MUSEUM vol. in 



Ogcodes pallidipennis, Kessel, Wasmann Collector, vol. 7, pp. 115-116, 1948 (not 

 Loew, 1865). 



Species of group v. 



Male: Length of entire specimen 4.75 mm., wing length 4.75 mm. 



Head entirely black except grayish black frons and dark brown 

 antenna; antenna with one small apical seta on segment iii (pi. 5, 

 fig. 25). 



Thorax black, covered with short, appressed, grayish white pile 

 (pi. 1, fig. 3), somewhat longer and less appressed on upper pleura; 

 legs with coxae, femora, tarsi black, tibiae black except for dark brown 

 on basal three-fourths of inner surface and basal one-fifth of outer 

 surface; wing hyaline, vein M, present throughout its length, but not 

 extremely strong, longer than R4+5, cross-vein m-cu completely absent, 

 r-m crossvein present and distinct, vein Mj short and pale (pi. 3, fig. 1 1) ; 

 squama opaque white with light brown margin, halter dark brown. 



Abdomen black with typical white posterior tergal fasciae occupy- 

 ing about one-fourth of each segment (pi. 1, fig. 3 and pi. 5, fig. 29), 

 entire dorsum covered with sparse, short, appressed, white pile (pi. 1, 

 fig. 3) ; sternites i and most of 11 black, median area brownish black, 

 iii-v brownish black with posterior margins a dirty white, wider 

 medially, abruptly narrowed laterally; posterior white margins of 

 iv-v occupy four-fifths of each segment medially. 



Genitalia dark brown and black; aedeagus as shown in plate 7, 

 figure 41; ejaculatory apodeme as in plate 6, figure 32. 



Female: Length of entire specimen 5.50 mm., wing length 6.70 

 mm. The same as described for the male except: Thoracic and ab- 

 dominal pile with a slight golden tinge; pleural area immediately 

 below wing base of several shades of brown; upper corner of meta- 

 notum brownish black; legs entirely black except knees narrowly 

 brownish black; r-m crossvein and vein Mj more pronounced; costal 

 cell somewhat infuscated ; posterior wliite tergal fasciae about one-half 

 as wide; sternites mostly brownish black with dirty white posterior 

 margins. 



FiRST-iNSTAR LARVA: Plauidium consisting of 12 segments, each 

 with various types of setae; a pair of granular eyes are located an- 

 teriorly on head; mouthparts consist of a pair of oral hooks and a 

 strong buccopharyngeal armature; the penultimate segment has a 

 pair of dorsal spiracles whose trachae branch once and run up into 

 head segment; caudal segment consists of several pairs of distinct 

 setae and hooks and a sucking plate (see pi. 2, figs. 4, 5). 



Pupa: Apparently not differentiated from other known species (see 

 pl. 1, fig. 1). 



Holotype: Male, Sardine Creek, Mono County, Calif., elevation 

 8,500 feet, July 12, 1951 (E. 1. Schlinger, CAS). 



