INSECUTOR INSCITI^ MENSTRUUS 27 



rowed, especially in male. Male vertex little over one-fifth 

 head-width, that of female about eye-width. Ocellar area and 

 posterior half of female parafrontals polished black, without 

 pollen in any light ; the male showing bloom almost to vertex. 

 Proboscis longer, palpi heavily thickened apically. Cheeks 

 nearly three-fifths eye-height in female, one-half same in male. 

 Anal segment with only marginal and submarginal macro- 

 chaetas. Male hypopygium large, with comb-toothed flanges. 

 Brush of heavy spines on sides of venter of anal segment of 

 male, less marked in female but present. Male ventral plates 

 2 and 3 spined as described and ventral profile deeply hol- 

 lowed. Male tarsi much shortened. 



The specimens referred to by Coquillett, 1897, Rev. Tach, 

 144, White Mountains, New Hampshire (pt.), both sexes; 

 Oswego, New York, two females, and (Camel's Hump) Ver- 

 mont, male, are this species. 

 Eularvaevora, new genus. 



Genotype, Tachina algens Wiedemann, 1830, Auss. Zweifl. 

 H, 285. 



Differs from Rhachogaster as follows: Second antennal 

 joint of female longer and third somewhat smaller. Para- 

 frontals pollinose in both sexes ; palpi less thickened at tip ; 

 cheeks rather over one-half eye-height; both sexes with two 

 to five median marginal macrochaetse on first segment and six 

 to seven on second. Abdomen rather long-hairy in male, short- 

 pilose in female. Macrochaetae somewhat weaker. Abdomen 

 of female distinctly broadened, that of male a little less so. 

 Male hypopygium much smaller and of distinct character, 

 ventroanal spine-brushes not developed. Male tarsi not short- 

 ened. Second and third ventral plates of male with long 

 bristles instead of spines, the ventral profile not deeply hol- 

 lowed. Dififers from Pahriciella by lack of ventroanal spine- 

 brushes. 



Wiedemann evidently had a female with dark or discolored 

 antennae. 



The specimens referred to by Coquillett, 1897, Rev. Tach. 

 144, Franconia, New Hampshire, male, and White Mountains, 



