1929 ] 
A New Species of Blepharocera 
123 
A NEW SPECIES OF BLEPHAROCERA FROM 
MASSACHUSETTS (DIPTERA) 
By 0. A. Johannsen, 
Ithaca, N.Y. 
Blepharocera similans n. sp. 
$ . Head dark brown including antennae, palpi a little 
paler. Face one-third as wide as head, front one-third 
wide as face. These measurements are based on a relaxed 
specimen. The area of enlarged facets about as with B. 
tenuipes. Antenna twice, the palpus as long as the width of 
the head. Fifteenth antennal segment a fifth longer than the 
fourteenth ; last palpal segment slender, and three times as 
long as the penultimate. Thorax yellow including scutellum ; 
the mesonotum shining brown with a purplish tinge and 
only faintly pollinose, the median space in front of scutellum 
with a pearly lustre ; anterior part of pleura, brown. Abdo- 
men brown, somewhat shining, posterior segments and hy- 
popygium darker; venter yellow anteriorly; narrow pos- 
terior margins of the first two or three tergites paler. Struc- 
ture of the hypopygium closely resembles that of B. tenui- 
pes. See Kellogg’s figure 2, plate 22, in the Proceedings of 
the California Academy of Sciences, 1903. In this figure the 
lateral lobes of the dorsal plate have parallel sides, their 
caudal margins squarely truncate, with the outer posterior 
angle of the lobe acute, the inner one right angled and the 
median tooth small. In my specimens of B. tenuipes the 
median tooth on the caudal margin of the lateral lobes of 
the dorsal plate is more conspicuous than that figured by 
Kellogg and with the apex directed slightly mesad. The lobe 
in the new species, B. similans , is relatively longer and the 
inner angle wholly wanting, the inner margin of the lobe 
gradually curving from the median tooth toward the base of 
the lobe. The claspers of B. similans are slightly more 
