March, 1915.] TOWNSEND : NeW MaSICERATID.E AND DeXIID.E, 67 



the female. Differs from Bathydcxia, as described by Brauer & von 

 Bergenstamm^ as follows : Abdominal macrochsetae arranged much 

 as in Tropidopsis and of same character, not being strongly or heavily 

 spinelike; those of second segment disposed closely in middle and on 

 hind border, those of third segment less closely placed but covering 

 whole dorsal surface, those of anal segment not so strong. The third 

 antennal joint of female is less than twice as long as second, and 

 about three times as long as wide. Facial <:arina is of moderate 

 strength, widened and flattened on distal portion, proximal end much 

 narrowed where it enters between the bases of the antennae. Para- 

 facials bare. No wrinkle or stump at bend of fourth vein. Other 

 characters are as follows : Cheeks very wide, behig a little less than 

 eye-height. Facial plate constricted by vibrissal angles, which are 

 high above the unprotruded oral margin. Facialia bare, parafacials 

 nearly as wide as long. Second antennal joint with two long bristles 

 on front edge. Arista plumose; eyes bare. Frontalia very wide, with 

 two long and very strongly proclinate orbital bristles set close to their 

 lateral borders posteriorly, the posterior one being a little in front of 

 the strongly proclinate and long ocellar bristles. Proboscis is about 

 as long as head-height, strong, labella well developed; palpi slender, 

 stout-filiform, reaching to oral margin. 



Three sternopleural and four postsutural bristles. Two strong 

 lateral scutellar bristles, and a slightly shorter decussate apical pair. 

 Abdomen widened and swollen, very short-oval, rather densely set 

 with subspinelike macrochastae. Bend of fourth vein very closely 

 approximated to wing-margin, last section deeply bowed in. Hind 

 crossvein gently sinuate, nearer to bend of fourth vein. 



Reproductive habit, larviposition probably in choria as near host as 

 fly can approach ; maggots uncolored. 



Type, Tropidodcxia lutzi new species. 



Tropidodexia lutzi new species. 



Length of body, 3.5 mm. ; of wing, same measurement. One female, near 

 Rio de Janeiro, south Brazil, collected by Dr. A. Lutz, probably in December 

 or January, and sent in liquid. 



Head wholly cinereous pollinose, frontalia brown, third antennal joint and 

 arista blackish, second antennal joint and base of third yellowish-red, palpi 

 reddish-yellow. Facial plate with a tawny tinge, especially on epistoma. 



1 Muse. Schiz., pt. Ill, pp. 172-173. 



