109 



cated. The wing expanse is about one-fourth of an inch (r).r)-7™"'), 

 and the length of the bod}- half that (8-3.5"""). 



The eg'gs are unknown, but they are probabl}^ like those of related 

 species, white in color and of ol)long shape and exceedingly minute. 



The larva, shown at /^, is a delicate threadlike creature, milk-white in 

 color, with a distinct minute jet-black head. The average length is 

 between 6 and 7™"', the length being about eight or nine times the 

 width, the latter being about 0.8 or 0.9'""'. 



The pupa shown in the illustration at ^, ventral view, is free (differ- 

 ing from the pupa of other Diptera in not being incased within its old 

 larval skin). The length is about 3.5™™, which is about three or four 

 times the width. The color is pale yellowish, with darker wing-pads, 

 and still darker head. The antennte and legs are folded down between 

 the wing-pads, as shown in the illustration. 



Fig. 29. — Sciara inconsfans: «,malc fly from above; h, external genital organs of the same; c, female; 

 d, enlarged antennal joints of same; c, maxillary psilpus of same; /, tip of abdomen of female from 

 side; £?, pupa ventral view; h, larva dorsal view — a, c,g,h, mnch enlarged; &, </, e, /, more enlarged 

 (original). 



DISTRIBUTION. 



Owing to the difhculty of determination of these miLute Myceto- 

 philid;e, little is known concerning their distribution. Since the 

 description of Sciara inconstans at Albany, N. Y., we have learned of 

 a few more localities, a number of which have just been mentioned. 

 The list comprises the following: Ottawa, Canada; Oroiio, Me.; 

 Jamaica, L. 1., N. Y. ; Kennett Square, Pa.; Clementon and Kiverton, 

 N. J. (Smith); Washington, D. C. ; Richmond, Va. ; Streator, 111 ; 

 Wooster, Ohio, and Nebraska City, Nebr. 



KECENT REPORTED OCCURRENCES. 



During the past three years Sciara inconstans Fitch has been reported 

 to be more or less troublesome in different portions of the country. 

 Where specitic identitications have been made, they are mostly on the 

 authority of Mr. Coquillett, who has also kindly criticized the illustra- 

 tion of the insect here presented. 



