ALDRICH AND DARLINGTON. 95 



middle cross-vein straight, upright; lower cross-vein straight, very slightly 

 oblique, parted by more than twice its length from the middle cross-vein, by 

 thrice its length from the end of tlie fourth longitudinal vein, and by near half 

 its length from the end of the fifth longitudinal vein; poisers tawny; scales 

 yellow, very small. 



" Length of the body 3| lines ; of the wings 6i lines. 



"Nova Scotia. From Lieut. Redman's collection." 



Heloniyza faisciata Walker. 



" Body clothed with black hairs and bristles ; head gray, adorned with white 

 reflections on each side of the ci'own and on the fore part, which is tawny ; sides 

 of the face without bristles; epistoma not prominent; eyes red, convex; all the 

 facets very small ; sucker black, clothed with tawny hairs; feelers black, nearly 

 as long as the face; third joint slightly conical, rather deep, rounded at the tip. 

 very much longer than the second joint; first and second joints dark ferrugi- 

 neous; bristle bare, rather stout at the base, more than twice the length of the 

 third joint ; chest and breast gray ; chest with a tawny tinge ; shoulders ferrugi- 

 neous, breast more hoary; abdomen tawny, sliining, spindle-shaped, a little 

 longer than the chest, slender at the tip; sutures of the segments black; legs 

 tawny, clothed with black hairs and bristles; feet black, tawny at the base; 

 foot-cushions very small ; wings pale gray, with a very slight tawny tinge; wing- 

 ribs pale tawny ; veins pitchy, pale tawny toward the base ; lower cross-vein 

 parted by much less than twice its length from the middle cross-vein, having two 

 very indistinct curves, the lower outward, the upper inward ; scales very small, 

 whitish, with pale yellow borders ; poisers tawny. 



"Length of body 2 lines, wings 4 lines. 



" Nova Scotia. Lieut. Redman's collection." 



The two descriptions immediately preceding, by Walker, need not 

 give the student much trouble. They are inserted merely for com- 

 pleteness, and to satisfy any curiosity which might arise, but not 

 with the expectation that they will be identified. In fact, one would 

 almost certainly go wrong in identifying a species under either 

 name, no matter how well the description fit. Czerny (pp. cit., pp. 

 202-205) has reported the results of his examination of Walker's 

 types of Helomyzidse ; out of 36 cases examined, there was not one 

 that even belongs in this family, the types being mostly Saproniy- 

 zidse, with an admixture of Trypetidse, Anthomyidse, etc. How- 

 ever, he does not say anything about tincta, and reports faseiata 

 lacking in the INIuseum. Hence we have not even the satisfaction 

 of positively excluding them from the family. 



Two specimens of barberi were received from the U. S. National 

 Museum under the name tincta Walker, but it is probable that the 

 name was applied before Czerny published his results; at any rate 

 we do not accept it. 



TRANS. AM. KNT. SOC. XXXIV. MARCH. 1908. 



