THE CANADIAN P-NTOMOLOGIST. 



143 



EUCHrF.CA AGAIN. 

 In my last paper listing these species, I contended that exhuniata, 

 Pears., being a valid species, the name should stand. Recently, in 

 studying the types of Tephroclystia in the Hulst collection at New Bruns- 

 wick, N. I., I made the unpleasant discovery that the type of inornata^ 

 Hulst, is a worn specimen of Euc/iceca exhumata, Pears, My name must, 

 therefore, give place to that oi Euchoeca inoinata, Hulst, with exhumata, 

 Pears., as its synonym. R. F. Pearsall, Brooklyn, N. Y. 



GALL GNATS OR CECIDOMYIID^. 



The Gall Gnats or Cecidomyiidte are best known on account of the 

 ravages of certain species, such as the Hessian fly, wheat midge, pear 

 midge, and others. These relatively icw species have inflicted enormous 

 losses upon American agriculture in the last century. Representatives of 

 this family present many interesting morphological variations, and possess 

 marked differences in habits. There must be a very large number of 

 species in America, as a recently-issued catalogue of Diptera lists over 750 

 European species referable to some 87 genera. ^^'e already have in our 

 collections in the vicinity of 500 species of these small flies, and it would 

 not be surprising were this number largely increased as a result of further 

 collecting. The members of this family are all small, ranging in size from 

 about .5 cm. to .5 mm . or even less. These insects have but few veins 



Fit;. 6. — Typical CcciJoinyiiil Wiiij^s : i, Canipylomyza ; 

 4. Porricomlyla. 



J, Lasioptcra ; .;. Mayetii>la ; 



(fig. 6) ; the costal vein is continued along the posterior border of the 

 wing, and is almost always narrower than the anterior border, while the 



April, 1907 



