INSECUTOR INSCITI^ MENSTRUUS 189 



and obtained several males, which sex was heretofore unknown. 

 The coloration is as in the female, except that the male has less 

 of white. 



Male hypopygium. Side pieces smooth, without hairs except 

 a few short ones on the outer side before tip; three long ones 

 at the base within crowded closely together. Clasper with a 

 long straight slender stem, the tip trifid ; central arm broad, 

 truncate, cleft, one half shorter than the other, the longer por- 

 tion quadrate, delicately setose on the margin, the shorter 

 portion with a row of four tubercles with recurved spines, the 

 margin expanded and notched near the middle ; short arm 

 absent ; core separated as a distinct arm, curved, pilose ; long 

 arm curved at base, narrowed, with a tubercle and recurved 

 spine at middle and at tip ; neither arm prolonged down the 

 stem (PI. V, fig, 3). Tenth sternites long, curved, dentate at 

 tip ; a pair of pointed setose pads beyond. Ninth tergites form- 

 ing a quadrate bridge, which in the specimen mounted bears 

 two stout spines on one side and three on the other. Eighth 

 segment partially divided and bearing coarse setae on the 

 margin. 



In my table of the known males of Wyeomyia (Ins. Ins. 

 Mens., vii, 129, 1919), this will fall with fallax B.-W. & B. 

 {= oblita Lutz) ; but differs in the shape of the clasper, the 

 produced part of the mid lobe being as wide as the short part 

 and equally squarely truncate. (Compare PI. V, fig. 6 of the 

 reference cited.) 



Majagual. Canal Zone, Panama, August 19, 1922 (J. B. 

 Shropshire). 



There are no good colorational differences between this and 

 leucopisthepus D. & K., the latter species on reexamination 

 proving to have white tips to the prothoracic lobes, thus oblit- 

 erating the supposed differences. 



Wyeomyia (Wyeomyia) incana, new species. 



A small slender species of the shape and coloration of 

 labesha and leucopisthepus, differing in the structure of the male 

 hypopygium. 



