266 Professor Williston on the 



1. Sclara germana, n. sp. (PL YIIL, fig. 21, wing.) 



$ , 2 ' Head black, opaque, thinly greyish dusted. Antennas 

 black, with white pubescence ; first joint of the flagellum some- 

 what yellowish. Thorax and halteres black ; mesonotum moderately 

 shining, with three rows of short black bristles ; pleurae whitish 

 dusted. Abdomen black or deep brown, venter on the sides 

 yellow or red in the female ; male forceps large. Legs pitchy 

 black. Wings blackish in front and along the veins, the cells 

 posteriorly subhyaline. The first vein reaches a little beyond the 

 furcation of the fourth vein ; the third vein reaches nearly to the 

 tip of the wing. Length 5-7 mm. 



Numerous specimens. It is possible that this is the 

 same as 8. nigra, Wiedemann, but the description is too 

 brief to afford any certainty that such is the case. It is 

 evidently closely related to S. thorn se, of Europe. The 

 origin of the third vein is a little before the middle of 

 the first vein. 



2. Sciara concinna, n. sp. 



$ . Front below the eyes and the face, brownish-red ; vertex 

 and occiput black, somewhat shining. Antennae black, shorter 

 than the abdomen ; basal joints yellowish ; proximal joints of the 

 flagellum with black pubescence, that of the distal joints whitish. 

 Thorax black ; humeri yellowish ; mesonotum moderately shining. 

 Abdomen black, with black hairs ; venter yellow. Coxae and femora 

 yellow ; tibiae brownish ; tarsi black. Wings uniformly smoky or 

 blackish ; origin of the third vein a little before the middle of the 

 first, which reaches as far as the furcation of the fourth vein; 

 prefurca of fourth vein distinctly longer than the anterior branch ; 

 tip of the third and of the posterior branch of the fourth veins 

 equidistant from the tip of the wing. Length 2|-3 mm. 



Numerous specimens. The male differs only in having 

 the antennae as long as the body. 



3. Sciara dehilis, n. sp. (PI. VIII., fig. 22, wing.) 



^ . Yertex shining black, with black hair ; front and face 

 reddish-brown ; palpi yellow. Antenna3 as long as the body, 

 luteous yellow, but obscured by the black pubescence. Thorax 

 light yellow, except the mesonotum and scutellum, which are 

 shining black ; humeri luteous. Abdomen black, with black hair ; 

 hypopygium yellowish. Coxae and femora light yellow ; tibiae and 

 tarsi brown. Wings smoky ; the third vein arises from beyond the 

 middle of the first vein, which does not reach as far as the furcation 



