Vol. XI] COLE AND LOVETT—LIST OF OREGON DIPTERA 



273 



431. Pipunculus confraternus Banks 

 Hood River, IX-29 (Cole). One female taken. 1910, 

 Trans. Amer. Ent. Soc, XXXVI, p. 285. 



432. Pipunculus proxima Cress. 



Hood River, VI-3 (Cole). 1910, Trans. Amer. Ent. Soc, 

 XXXVI, p. 318. 



433. Pipunculus similis Hough 

 Hood River, VI-4 (Cole). 



Family SYRPHID^ 



Fig. 29. Sphegina punctata Cole, n. sp. Drawing of holotype. 



The adults are usually of moderate size and bright colors, 

 black and yellow predominating. One of the distinguishing 

 characteristics of the family is a thickening of the wing 

 membrane, appearing as a spurious longitudinal vein. Over 

 700 described species occur in North America. 



The more common forms of the genus Syrphus and its 

 near relatives frequent fields and gardens, hovering here and 

 there about the blossoms. Mimicry is well developed among 

 the less typical forms, some are almost bare and mimic 

 wasps, others are hairy and mimic bees. The adults feed 



