80 NEW YORK STATE MUSEUM 



bb Palpi triarticulate 



c Circumfili with short bows or loops, their length being one-half the 

 diameter of the enlargement or less 

 d Thorax plainly extending over and concealing the head, at 

 least to a considerable extent 

 e Males with 15 to 27 or possibly more antennal segments, 

 females with 14 or more antennal segments, the flagel- 

 late segments of the female usually strongly constricted ; 



ovipositor short, species mostly large 



Hormomyia H. Lw. 

 ee Male and female with 14 or 1 5 (15th rudimentary) antennal 

 segments, the flagellate segments of the female cylindri- 

 cal and mostly with three circumfili, the ovipositor 



moderately long, species medium to small 



Trishormomyia Kieff. 

 dd Thorax not produced over the head to a marked degree 



e Flagellate antennal segments of the male binodose or 

 cylindrical 

 / Third vein uniting with the margin near the apex, 

 wings rather short, broad, the male antennae about 



as long as the body, the ovipositor short 



Caryomyia Felt 

 cc Circumfilar loops with a length equal to the diameter of the enlarge- 

 ment or longer 

 d Basal clasp segment lobed, ventral plate chitinized and den- 

 ticulate, genitalia moderate in size 



Odontodiplosis Felt 

 dd Basal clasp segment not distinctly lobed 



e Third vein uniting with the margin beyond the apex of 

 the wing, dorsal plate deeply and narrowly incised, 

 ventral plate broad and rounded ....Adiplosis Felt 

 bbb Palpi uniarticulate 

 c Wings hyaline 



d Fourteen antennal segments in both sexes, the third and fourth 

 not fused, the basal and distal enlargements globose and 

 pyriform, respectively; dorsal and ventral plates deeply 



emarginate, the ovipositor short, chitinous, falcate 



Monarthropalpus Rubs. 

 dd Fourteen antennal segments in the female, the fifth with a 

 stem one-third the length of the basal enlargement, which 

 latter has a length two and one-half times its diameter; third 

 and fourth free; ovipositor stout, with a length one-half that 

 of the abdomen, the distal part thickly clothed with long, 



silky hairs; male unknown Onodiplosis Felt 



ddd Thirteen antennal segments in the female, the third and fourth 

 fused, the basal and distal nodes globose and ovoid, respec- 

 tively; dorsal and ventral plates bilobed; ovipositor stout, 



chitinous, needlelike Cystodiplosis Kieff. 



cc Wings black and yellow marked 



