INSECUTOR INSCITI^ MENSTRUUS 145 



Venation : Sc^^ ending just beyond r; outer deflection of M^ 

 lacking; basal deflection of Cu^ just before the fork of M; 

 2nd Anal vein sinuous on its terminal half, at its extreme apex 

 bent slightly toward the first anal vein, the first anal cell widest 

 at the margin. 



Abdomen dark brown, the genital segments brighter. Male 

 hypopygium with the pleural appendages small, subequal in 

 shape and size, narrowed to the obtvise apex, the outermost 

 pale with a few small apical setce, the inner appendage black- 

 ened. Gonapophyses powerfully developed, in the form of a 

 black, chitinized, cvirved horn on either side, the horn of the 

 right side with a single strong tooth at about midlength, the 

 left horn with a broad tooth that is minutely bifid at its tip. 

 This may vary in different specimens. 



Habitat. — Maine. 



Holotypd. $ , Orono, Penobscot County, June 5, 1913 (C. P. 

 Alexander). 



Allotopotype, 9 , June 8, 1913. 



Paratopotypes, 3 9 's, June 5-10, 1913. 



O. dentifera has no close relative in eastern North America. 

 Superficially it resembles O. deviata Dtz. but is readily told 

 by the coloration and the very distinct male genitalia. 



Ormosia adirondacensis, new species. 



Close to 0. bilineata Dtz. ; coloration reddish gray, the mid- 

 dorsal area slightly darker ; wings faintly grayish ; outer de- 

 flection of M.{ lacking, anal veins divergent. 



Male. — Length, 4-1.2 mm. ; wing, 4.7-5 mm. 



Rostrum and palpi dark brown. Antennae moderately elon- 

 gated, brown, the flagellar segments with conspicuous, white, 

 outspreading hairs. Head dark. 



Pronotum brown, the posterior and lateral margins con- 

 spicuously light yellow. Mesonotal praescutum reddish gray, 

 the mid-dorsal area darker brown, some specimens showing 

 indistinct shorter lateral stripes of the same color. Pleura 

 brownish yellow, gray pruinose. Halteres yellow. Legs with 

 the coxae brownish yellow ; trochanters yellow ; remainder of 

 the legs light brown. Wings with a faint grayish tinge, the 



