INSECUTOR INSCITI^ MENSTRUUS 191 



pair occupying one fourth the width of the front, inner bristle 

 of lower reclinate row somewhat below the outer one and set 

 near the post antennals so that it is equidistant from the eye 

 margin and the median line ; inner bristle of upper row equi- 

 distant, the median pair slightly lower than the outer one ; 

 ocellar tubercle and median frontal groove well developed. 

 Antennse rather large, with a nearly bare arista slightly longer 

 than the front ; palpi of good size, with strong bristles ; pro- 

 boscis extruded, but not thickly chitinized. Front strongly 

 poUinose, with many small bristly hairs. Cheeks with several 

 strong bristles below ; post-ocular cilia unusually strong. 

 Mesonotum shining, very bristly on the sides and behind, just 

 before the scutellum. Scutellum with four very large, equal, 

 marginal bristles. Peropleura with four strong bristles next 

 the coxa and three weaker ones below the spiracle, bare be- 

 tween, mesopleura bare. Abdomen hairy near tip, but without 

 distinct bristles on the sides of the second segment. Legs 

 rather slender, the fore tarsi not at all thickened ; hind tibiae 

 with weak, widely placed cilia on the apical half which become 

 obsolete toward the base. Wings large, rather long and nar- 

 row. Costa extending distinctly beyond the middle of the 

 wing, with short, closely placed cilia. First section of costa as 

 long as the second and third combined ; second nearly three 

 times as long as the third ; fourth vein sharply curved at base, 

 straight beyond; fifth and sixth slightly sinuate; seventh 

 rather long. 



Type from Battle Creek, Michigan. 



This species is related to A. johannseni Malloch, but the 

 frontal chaetotaxy is quite different, the costal fringe is not 

 long, and it is a smaller species. 



Aphiochaeta pleuralis Wood. 



Entom. Monthly Mag., vol. 20, p. 117 and 146 (1909). 



A series of ten specimens from Algonquin, Illinois, collected 

 in October, 1895, by Dr. Nason, have been in my collection 

 for a number of years. They represent both sexes and seem 

 to be identical with this European form so far as I can judge 



