128 INSIiCUTOR INSCITLTJ MENSTRUUS 
Tipula illinoicnsis, n.n., for T. versicolor Loew (1863), non T. versi- 
color Gmelin (1792), p. 2819. 
Tipula ignota, n.n., for T. discolor Loew (1863), non T. discolor 
Gmelin (1792), p. 2819. 
Tipula iroquois, n.n., for T. cincta Loew (1S63), non T. cincta Gmelin 
(17.92), p. 2820. ^ 
Tipula labradorica, n.n., for T. tessel'ata Loew (1863), non T. tesselata 
de Villers (1789), p. 397. ^ 
Tipula senega, n.n., for T. pallida Loew (1863), non T. pallida de Vil- 
lers (1789), p. 389. 
Tipula ultima, n.n., for T. flavicans Fabricius (1805), non. T. flavicans 
de Villers (1789), p. 403. 
Stygeropis unimicra, new species. 
Male. — Length, 10 mm. ; wing, 12.3 mm. 
Palpi dark brownish black. Frontal prolongation of the 
head short, light gray, the nasiis long, slender. Antennae rather 
long, the basal segments dull yellow soon passing into dark 
brown ; the third to fifth segments are produced apically to 
give a subserrate effect; terminal segment tiny, attenuated. 
Head dull, dusky gray, narrowly lined with black, clearer on 
the sides of the occiput ; a shallow depression behind the an- 
tennal bases ; front produced cephalad between the antennal 
bases as a slender tongue. 
Mesonotal przescutum dull grayish brown with three dark 
brown stripes, the middle one of which is indistinctly bisected 
by a gray line ; scutum with the lobes gray marked with brown ; 
scutellum and postnotum gray. Pleura clear light gray with 
the dorso-pleural membranes brownish yellow. Halteres short, 
light yellow, the knobs elongated, brown. Legs with the coxae 
pale, densely gray pruinose ; trochanters yellow ; femora dull 
yellow, the apical half browner; tibiae dull yellow passing into 
brown toward the tip ; tarsi brown. Wings brownish gray, the 
costal region slightly brighter ; stigma brown ; veins dark 
brown ; a broad vitreous band before the cord extending into 
the base of cell M^. 
Abdominal tergites dark brown with a sparse gray bloom ; 
segments 3 to 9 with the caudal margin narrowly ringed with 
silvery yellow; lateral margins of the segments almost white; 
sternites light gray, broadly ringed with paler caudally. Hy- 
