138 DIPTERA OF NORTH AMERICA. 



dish-yellow. Thorax without lines or stripes. Abdomen very 

 unicolorous, having only on each of the two middle segments two 

 triangular brown spots of middle size ; of the two exterior rows of 

 spots, which generally occur on the abdomens of the Notiphilte, 

 nothing is to be seen here. Femora black, appearing gray in 

 consequence of their being dusted, with yellowish tips. Tibia3 and 

 tarsi brownish-yellow ; fore tibiae towards their tips and fore 

 tarsi brownish on their whole extent ; the posterior tarsi only 

 with their last joint brown. The short hair, resembling fringes, 

 on the under side of the middle femora and tibite is rather thin. 

 Wings rather sandy-yellowish, particularly at the base, the second 

 segment of the costal vein is a little more than twice as long as 

 the third. This species resembles most the European Noliph. 

 guttiventris Stenh., but is easily distinguished from it by its smaller 

 size and more yellow color, by the cheeks descending deeper be- 

 neath the eyes and by the much less spotted abdomen. 



Gen. III. PARALIUftfA LOEW. 



The characters of this genus, of which I hitherto only know South 

 African and North American species, are the following. Structure, 

 colouring, and markings as in Notiphila. Eyes much rounded ; 

 front and face very broad, the latter slightly convex ; eye-rings 

 broad ; cheeks descending very deeply beneath the eyes ; clypeus 

 prominent ; palpi narrow ; terminal bristle of the second joint of 

 the antennas very small and hardly visible ; the third joint of 

 the antennas very distinctly hairy on its upper side and tip ; the 

 antennal bristle with long rays. Structure of the thorax, scutel- 

 lum, and abdomen as in Notiphila. Middle tibia? on their upper 

 side with three long bristles, the first being very near the base, the 

 second immediately before the middle, and the third not far from 

 the end. Wings as in Notiphila, only with the exception of the 

 thickened costal vein being extended to the tip of the fourth lon- 

 gitudinal vein. 



1. P. appemliculata LOEW. and 9 . Bruunea, fronte, thorace 

 scutelloque obscurius punctatis ; facie fasciisque interruptis abdoininis 

 nigri canis ; palpis, antennis pedibusque nigris, tarsorum anticorum 

 posticorurnque basi rufa ; alis cinereis, venis transversis et venula ap- 

 pendicea e penultimo venae quarta? segmento ascendente nigro-limbatis. 



Brown, front, thorax and scutellum with darker dots ; the face and the 

 interrupted fascia? of the black abdomen are grayish-white ; palpi, an- 



