{539| INVERTEBRATE ANIMALS OF VINEYARD SOUND, ETC. 245 
ARTICULATA. 
INSECTA. 
The insects ineluded in the following catalogue have mostly been de- 
termined by A. S. Packard, jr., M. D., and by George H. Horn, M. D., 
who have also kindly furnished descriptions of the new species. Our 
thanks are also due to Dr. H. A. Hagen, who has identified some of the 
species. The Pycnogonids have been determined by Mr. 8. I. Smith. 
DIPTERA. 
CHIRONOMUS HALOPHILUS Packard, sp. nov. (p 419.) 
Full-grown larvee were dredged in 10 fathoms in Vineyard Sound, 
several miles from land, among compound Ascidians, (A. E. V.;) and 
several young larve were dredged in 8 to 10 fathoms in Wood’s 
Hole Passage, September 10, (A. 8. P.) 
“This is a true Chironomus, the body being long and slender, with 
the usual respiratory filaments at the end of the body. Head red as 
usual, chitinous; antennie slender, ending in two unequal spines; eyes 
black, forming conspicuous dots; mandibles acute, three-toothed. 
From lower side of antepenultimate segment arise two pairs of long 
fleshy filaments, twice as long as the diameter of body, not containing 
trachex, so far as I can see; and from the end of penultimate segment a 
dorsal minute tubercle, forming a cylindrical papilla, giving rise to eight 
respiratory hairs about as long as the segment is thick; anal legs long 
and slender, with a crown of about twelve spines. Two prothoracic 
feet, as usual. In one larva the semi-pupa was forming; length, 11™™, 
(.45 inch.) 
This species belongs in the same section of the genus with Chirono- 
mus plumosus, figured by Reaumer, (vol. iv, Pl. 14, figs. 11 and 12; and 
vol. v.)"—A. S. P. 
CHIRONOMUS OCEANICUS Packard. (p. 331.) 
Proceedings of the Essex Institute, vol. vi, p. 42, figs. 1-4, 1869. 
Specimens apparently belonging to this species have been obtained 
near New Haven, atlow-water mark, among confervie. It occurs at Sa- 
lem. Massachusetts; Casco Bay; and the Bay of Fundy, from low-water 
mark to 20 fathoms. 
CULEX, species undetermined. (p. 466.) 
A species of mosquito is excessively abundant on the salt-marshes in 
autumn, and the larye inhabit the brackish waters of the ditches and 
pools. _ 
