186 INSECUTOR INSCITI^ MENSTRUUS 



Type from Lacoiiner, Washington, May 23, 1908 (Mel- 

 ander). 



This species is remarkable for its stiffly bristled and other- 

 wise elaborate hypopygium, and could not be confounded with 

 any other. In Wood's table of British species it will run in the 

 neighborhood of A. invohita Wood, from which it differs at 

 once in its large antennae and in the hypopygium. 



Aphiochaeta palpata, new species. 



Male. Length 1.5 mm. Black, legs brown. Middle and 

 hind legs, except trochanters, very dark, almost piceous ; basal 

 half of front femora nearly as dark ; apical half and their tarsi 

 pale yellowish ; other tarsi light brown ; palpi black above ; dark 

 brown below ; halteres black ; wings hyaline, heavy veins pice- 

 ous. Front as broad as long ; subshining, with the fine hairs 

 unusually stout, especially in the middle below where some 

 are nearly half as long as the macrochaetae ; upper proclinate 

 bristles separated by one-third the width of the front, lower 

 ones of the same size, much closer together ; inner bristle of 

 lower row nearer to the eye than to the proclinate bristle and 

 well below the outer bristle which is next the eye ; upper row 

 slightly curved down medially, its bristles equidistant ; set 

 above the upper third of the front ; ocellar bristles larger than 

 the other ; ocellar tubercle and median frontal groove well 

 developed. Antennas of moderate size, with long pubescent 

 arista. Palpi small and slender, their bristles numerous but 

 not very large ; cheeks each with a pair of large bristles and a 

 row of strong ones leading along the eye margin toward the 

 antenna. Mesonotum rather shining, densely hairy ; two scut- 

 ellar bristles. Propleura with several bristles near the base of 

 the coxa and with numerous small ones behind the spiracle ; 

 mesopleura with a patch of small, nearly equal bristles above. 

 Abdomen dull black, with a few minute bristle-like hairs along 

 the sides. Hypopygium small, with a row of three or four 

 bristly hairs on each side above and a larger one at each lower 

 anterior angle ; lower posterior angle with only an extremely 

 minute hair ; lamella small, slender, with a pair of upcurved 



