6 PROCEEDINGS OF THE NATIONAL MUSEUM vou 79 



on upper surface; in male the fourth segment is shorter than the 

 third, ordinary in shape, with several irregular rows of bristles on 

 apical half. Ovipositor blunt, not fitted for piercing. 



Hind tibia ciliate. Wing with a rectangular bend in fourth vein, 

 which ends far before the apex; veins bare except third; no costal 

 spine. 



SIPHOSTURMIA ROSTRATA Coquillett 



Argyrophylax rostrata Coquuxett, Journ. New York Ent. Soc, vol. 3, p. 106, 



1895. 

 Si:phosturmia rostrata Coquillett, Revis. Tachin., p. 83, 1897. 



The long tapering proboscis, projecting mouth, and elongated 

 second antennal joint make the species easily recognizable. It is 

 a well-known form, and Coquillett's description supplies most of the 

 essential specific details. In the male genitalia the inner forceps 

 are blackish, narrow, and united at base, divided beyond middle but 

 not divergent, tips blunt, in profile rather straight on posterior side 

 and almost uniform in thickness from base to tip; outer forceps 

 yellow, triangular, hardly shorter than inner, tips rounded, beset 

 with minute black hairs; basal segment of penis slender, shining 

 black, the distal one shorter and a little thickened, the apex with 

 a pale expanding membrane. 



The species ranges from Ohio to Florida and westward to Texas. 



SIPHOSTURMIA CONFUSA, new species 



Coquillett determined the present species as Sturuiia normula van 

 der Wulp, and although clearly misplaced in this genus, it has been 

 passing under this name for many years. In 1929, Dr. J. M. 

 Aldrich examined Wulp's type series now in the British Museum 

 and kindly permitted me to study his notes. In brief these show 

 that Wulp had two species involved, one of which is Stumiia aZhi- 

 frons^ and the other, to be taken as the true S. normula^ is a form 

 closelj^ allied to S. alhifrons. A comparison of the species here con- 

 sidered with (dhifrons readily shows them to be distinct and members 

 of different tribes. 



Mcde. — Front at narrowest point (before ocelli) 0.34 of the head 

 width (average of six: 0.32, 0.34, 0.34, 0.33, 0-36, 0.35) ; front and 

 face covered with thick, rather dull-gray pollen ; paraf rental clothed 

 with black hairs, some extending close to eye ; median stripe reddish, 

 broad to triangle extending on either side to vertex; frontals about 

 nine in number, uppermost two largest, reclinate, the lower one 

 close to eye at level with base of third antennal joint ; inner verticals 

 strong, suberect, and curving backward, the outer pair usually vestig- 

 ial but sometimes developed to half the size of inner ones and 

 strongly divaricate; ocellars large, proclinate; no orbitals; para- 



