52 PROCEEDINGS: BOSTON SOCIETY NATURAL HISTORY. 
Ravinia R.-Desvoidy. 
1826. Sarcophaga Meigen, Syst. Beschr. Zweifl. Ins., vol. 5, p. 14, {pars). 
1S63. Ravinia R.-Desvoidy, Hist. Nat. des Dipt., vol. 11, p. 434. 
1910. Sarcophaga Coquillett, Proc. U. S. Nat. Mus., vol. 37, p. 602, (pars). 
1912. Sarcophaga (Ravinia) Bottcher, Deutsch. Ent. Zeitschr., p. 708. 
1913. Sarcophaga (Ravinia) Bottcher, Deutsch. Ent. Zeitschr., p. 366. 
Genotype, Sarcophaga haematodes Meigen. 
Medium-sized to small species. Front more or less prominent; 
at narrowest part not less than one half eye width; cheeks clothed with 
black hair; frontal bristles parallel or lower portion of rows diverging 
slightly toward eye orbit, scarcely extending below base of vitta; at 
least three rows of black cilia behind eyes; metacephalon wholly or 
for most part clothed with whitish or yellowish-white hair. Vestiture 
of metanotum of short, scattered bristles; epaulets brown and light 
yellow, sometimes onlj- light yellowish, anterior face of posterior 
femur with several rows of bristles, an upper and a lower always pres- 
ent, intermediate rows present or absent, if present the bristles short 
or vestigial; fourth tarsal joint at least one half length of fifth; middle 
femur with anterior and posterior complete rows of bristles, those of 
latter the longer; tibiae piceous to dark brown, rarely same color as 
femora; four notopleurals, second and fourth longest; anterior dorso- 
centrals and acrostichals always present; scutellar apicals absent; 
lower sternopleura with several rows of bristles. Abdomen of cf 
somewhat conical, of 9 subcircular or somewhat oval in outline; 
ventral plates broad, with their sides as a whole approximately paral- 
lel, second sometimes appears slightly the broadest; third plate uni- 
formly covered with short erect or nearly erect hairs that are of equal 
length except those fringing posterior margin. 
Genital segments of cf . — Prominent, first usually with posterior 
half exposed; dorsal, posterior, marginal bristles present; second, 
generally larger than first, subrotund, as a rule its posterior surface 
flattened diagonally upward and forward from base of forceps; anal 
area small, extending but a short distance above base of forceps. 
Forceps somewhat rounded at base, latter without upward flap-like 
extensions and its vestiture short; prongs wide spread, darkened at 
tips. 
The genitalia of the species herein described agree in the following 
characters. These are probably, though not necessarily, of generic 
value. Penis not divided into proximal and distal portions; posterior 
