128 U.S. NATIONAL MUSEUM BULLETIN 277 



developed, but short, less than half the length of the oral opening; 

 palpi short; margin of face between oral opening and eye silvery 

 pilose to above the antennal base; back of head concave. Ocellar 

 tubercle not prominent, ocelli clear; antennae red-brown, first segment 

 short; second twice as large as first; third elongate, pear-shaped, over 

 twice as long as first two combined. 



Thorax dorsum black, rugose with scattered light hairs; humeral 

 and supra-alar calli orange-brown; pleural areas red-brown. Wings 

 mUky, veins tan; halter stem brown, knob white. Legs red-brown 

 except proximal portion of tarsi orange-brown. 



Abdomen red-brown, segments 3-5 broadly white except at lateral 

 margins where triangular pieces of sclerotized tissue remain. Termi- 

 nalia red-brown; see figure for details of structures. 



Female. — Head black, eyes red-brown; a medium wide subshining 

 postocular band extending into a broad postgenal area below and 

 behind the eyes; frons broad, slightly narrower than the eye when 

 viewed from the front, swollen above the antennae, with a median 

 groove and depression above the swelling, groove extending to just 

 below the median ocellus, surface rugose subshining; ocellar tubercle 

 not distinctly separated or elevated, ocelli clear to amber; mouthparts 

 red-brown, short, with short palpi; silvery pile between oral opening 

 and eye margin. Antennae as in the male. 



Thorax as in male; wing veins darker; 



Abdomen red-brown subshining; for eighth segment details and 

 bursa, see figure. 



Length: Male body 3.2 mm., wing 2.3 mm.; female body 3 mm., 

 wing 2.3 mm. 



Type-locality: 8 mi. s. Lovelock, Nevada; 30 May 1958, (T. R. 

 Haig). 



Holotype: Male, allotype female, same data, (USNM) 67475. 



Paratype: cf Adelaide, Idaho; 7 July 1927, (UCalD). 



87. Scenopiniis curticornis (Krbber) 



Figure 86 



Omphrale curticornis Krober, 1913, p. 202. 



This species from Brazil is known only from the type and is easily 

 distinguished by the extremely short third antennal segment. 

 Male.- — Unknown. 



Length: Female body 4.5 mm., wing 2.8 mm. 

 Type-locality: Brazil; in Winthems Coll. as pygmaeus Loew. 

 Type: (NMV). 



