266 
Psyche 
[December 
Lynchia Weyenbergh 
Lynchia Weyenbergh, 1881, Anales Soc. Cientif. Argentina, XI, 
p. 195 (monotypic for Lynchia penelopes Weyenbergh.) 
“ Antennae gemmiformes elongatae setosae, lateribus hiposto- 
matis insertae. Ocelli nulli. Tarsi unguibus tridentatis. Alae 
latae incumbentes abdomine multo longiores, acuminatae. 
“This genus must be placed between Ornithomyia and 01- 
fersia. Although the antennae are bud-shaped, they are longer 
than in Ornithomyia and hairy, especially at the tips, and are 
inserted very low down. The two compound eyes are very 
globular and leave between them a wide front; but there are no 
ocelli, instead of which one finds on the spot where they usually 
occur a small triangular plate, of a dark color, and somewhat 
raised. This peculiarity, viz. the lack of ocelli, removes the genus 
from Ornithomyia and brings it near Olfersia. The tridentate 
claws, on the other hand, bring it nearer the former and remove 
it from the latter, which has bidentate claws [the claws are tri- 
dentate in Olfersia also. — J. B.] The wings are on the whole 
similar to those of Ornithomyia and Olfersia, but in the last- 
named genus they are much rounded off at the apex, and they 
are also quite obtuse in Ornithomyia ; while in Lynchia they are 
much pointed, although being also very long. The head is flat, 
disciform, as in the genera mentioned, which it also resembles in 
the mode of articulation with the thorax and in general appear- 
ance. The mouth-parts are very short and completely hidden 
within the short sheath that envelops them. The line or trans- 
verse suture, which divides the thorax into two parts, is very 
distinct in this genus; but the longitudinal line, which in the 
other genera is furrow-like, is much raised in Lynchia , even 
forming a linear elevation. On the outer angle of the thorax one 
sees an ovate spiracle, with several stiff hairs on the anterior 
margin. The scutellum is very short and broad. The abdomen 
bears strong spines on the lateral margins of the segments, and 
long hairs at the apex. The legs are little hairy; one finds only a 
few stronger hairs about the claws. The veins of the wings are 
quite characteristic, although showing some similarity to those 
of Ornithomyia ; but the difference is greater than the resem- 
