382 



XORTH AMERICAN DIPTERA 



Family Dryomyzidae 



Flies of moderate size, the femora without bristles. 



Head short, as broad or broader than the thorax, the face retreat- 

 ing, more or less perpendicular below, without oral vibrissse. Abdomen 

 composed of six segments, moderately long and narrow, more or less 

 cjdindrical. Wings longer than the abdomen, the auxiliary vein sepa- 

 rated from the first vein; posterior basal and anal cells complete. Legs 

 of moderate leno'th, the tibiae witli a preapical bristle. 



The adults are found in moist places, along the edges of streams, 

 ponds, etc. Swampy woods are excellent collecting spots. 



The larvffi are aquatic. They are slender, cylindrical, thin anteri- 

 orly, the terminal segment with six or eight conical, fleshy tubercles. 



The flies placed in this family have been included in the Tetano- 

 ceridffi and Helomyzidte. From the former they are separated by the 

 absence of femoral bristles and from the latter by the absence of oral 

 vibrissa. The latest revision of the family is by ]\Ielander* who included 

 the genera in the Tetanoceridfe. 



Review of the Nearctic Tetanocerida?, 1916, Ann. Ent. Soc. Amer., xiii, pp. 305-322. 



Dryomyzidae. — 1, 2, Macromelanderia mirabilis; 3, 4, Neuroctena anilis; 5, 6, ffidoparena glauca. 



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