Twelfth Report op the State Entomologist 225 



Fore coxa a liitle over one half the length of femur or tibia, tarsi 

 about one-fourth longer, first segment nearly equal to the remaining seg- 

 ments ; middle legs nearly the same; posterior tibia one-fourth longer 

 than the slightly elongated femur; first segment of tarsi equal in length 

 to the remaining segments. 



Abdomen of both sexes sparsely invested with setae. The abdomen 

 of the female enlarges shghtly to the fourth segment, from which it 

 tapers moderately to the slender ovipositor; the terminal portion of 

 the genital plates oval. 



Abdomen of the male nearly cylindrical and bearing the usual en- 

 larged segment with claspers which are terminated by a single stout curved 

 spine. The setae are thickest on the claspers, especially on the apical 

 portion and along the inner margin. On the median line of the ventral 

 sclerite of the last segment there is a sparse group of stout setae, each 

 arising from an enlarged base (PI. VI, fig. 12). Near the basal third of 

 the clasper there is a very long seta on its inner margin, extending nearly 

 to the median line. There is also a pair of long stout setae, a dorsal and 

 a ventral one, at the base of each clasper. 



Length: male, body 2.75 mm., wing 2.5 mm.; female, body 3.5 mm.^ 

 wing 3 mm. 



This species may be separated from the preceding by the darker color 



of the palpi, thorax, and abdomen, by the greater length of the third 



antennal segment, and by the few setae in the group on the median line 



of the ventral sclerite of the terminal segment in the male. 



Numerous small flies of this genus were found in the mushroom cellar 

 of Dr. Wm. Hailes, of Albany, N. Y., June 6, 1896. It was stated that 

 at times the cellar would be almost black with this and other species, 

 although they were by no means so abundant when the cellar was visited 

 by me. With the advent of hot weather the flies become so numerous 

 as to destroy the mushrooms quickly and render their further culture 

 unprofitable. 



The flies agree with no description of American forms known to me. 

 The species is evidently closely related to Sciara villosa Winnertz, though 

 apparently different. 



Sciara agraria n. sp. Head and thorax a very dark brown, nearly 

 black, shining; abdomen a variable dark brown, base of terminal seg- 

 ment and base of claspers in male with a yellowish cast; antennae dark 

 brown with a dense whitish pubescence; palpi dark brown, terminal 

 segment a little lighter; wings iridescent, tinged with fuscous, anterior 

 veins nearly black, the others pale yellowish : halteres fuscous apically, 

 yellowish at the base; coxae smutty yellow, anterior pair lighter, femora 

 and tibiae a little darker, and tarsi fuscous distally, tibial spurs yellow. 



Antennae half the body's length in the male, in the female about one- 

 third ; the enlarged basal segments globose ; the third to the fifteenth as 

 long as thick, cylindrical, terminal one subconical. Palpi; second seg- 

 ment subelliptical, with a medium sized sensory pit; third suboval, 



16 



