PARKER: XHW ENGLAND SARC()I'H.\( ;i DAK. 53 
phite continuous from base to top ot' pt-nis, variously niodilicd distally. 
Three processes extend fonvard from distal anterior surface, an upi)C'r 
median and paired laterals slightly beneath them. Anterior and 
posterior claspers ahvays present, former much the longer, latter 
hooked at distal end, not merely bent forward. These characters will 
at least be of use within the limits prescribed by this paper. 
An impressed line may be seen extending upward from the anal 
area, in species of Ravinia, but it seems to be a vestigial character 
representing the line of fusion IietAveen sides of an anal area once 
much larger. li^ven when the line is indistinct the inward fold of the 
chitin or membrane can usually be seen showing through. 
The genus Ravinia is represented in our New England fauna by at 
least four species ; probably there are seven or eight in North America. 
Bottcher (Deutsch. Ent. Zeitschr., 1913, p. 366), who considers this 
as a subgenus of Sarcophaga, places R. paUinervis (Thomson) (Cali- 
fornia and Hawaii) and R. xanthopyga (South Carolina, see below) 
in this genus on the arrangement of the frontal bristles, probably cor- 
rectly. Of itself this is not sufficient, however, as members of the 
assidua group of that genus (to a less marked extent) show the same 
character. It is possible that one species here described may be 
synonymous with Ravinia paUinervis (Thomson) but if so this cannot 
be determined from Thomson's description, though this agrees with 
R. latisciosa in several points. Though mentioned by both Brauer and 
Bergenstamm (Zweif. d. Kaiserl. Mus., vol. 5, p. 414) and Bottcher 
I have never been able to find any description of xanthopyga by Schiner 
to whom the species was credited. Concerning this Dr. Bottcher has 
written me that in the collection of the K. K. Hofmuseum, Wien, where 
Schiner 's material is deposited, there are two specimens labeled " S. 
xanthopyga det. B. B. (Siid-Carolina Coll. Winth) " and below, another 
label, " xanthopyga Sch'm. — Siid. -Carolina." Apparently no descrip- 
tion was ever published and as Van der Wulp has since used that name 
for one of his Mexican species, it must be held for the latter. I have 
specimens from the United States National Museum determined as 
Van der Wulp's xanthopyga. If correctly identified this is also a 
species of Ravinia. 
Some species of Ravinia have two parallel ' brushes ' on the lamellae 
of the fourth ventral plate, some lack them and have the lamellae 
wide spread, others show still different characters. Certain species 
have both the first and the third vein bristlv, others onlv the third. 
