268 ENTOMOLOGICAL NEWS. [June, 'lO poasca inali were found on these trees at this time. These nymphs were more pale than those of Empoasca mali and lack-ed the yellowish tinge. Young nymphs were also found on elm leaves at Charles City, Iowa, May 22, and on maple leaves at Ames, May 31. Nymphs from both elm and maple leaves were reared to ma-turity in the insectary, adults being found May 31 to June 15, and the species was then determined as Typhlocyba rosae. On June 1 1 many of the older nymphs and adults, as well as a few newly hatched nymphs of this species were found on elm leaves at Ames. These youngest nymphs may have been the first of a second generation. The species has been found commonly throughout the summer on apple leaves. Prof. Herbert Osborn kindly looked over some of the bred material of the three species while he was in Ames during June, 1909, and made tentative determinations for me at that time. West Indian Cecidomyiidae. By E. P. FELT, Albany, N. Y. Cecidomyia manihot n. sp. This yellowish brown species, only about I mm. long, was reared from leaf galls on Cassava, Manihot utilissiina, by Wil-liam H. Patterson, Agricultural School, St. Vincent, W. I. The male may be recognized most easily by the long, deeply and roundly emarginate ventral plate and the short stems sep-arating the antennal enlargements. Male. Length i mm. Antennae */> longer than the body, thickly haired, fuscous yellowish ; 14 segments, the fifth binodose, the basal stem with a length equal to its diameter, the distal portion of the stem with a length twice its diameter, the basal enlargement subglobose, the distal enlargement with a length l / 2 greater than its diameter, the three circumfili with rather long, sparse loops. Palpi ; basal segment sub-quadrate, the second with a length four times its diameter, the third as long as the second, the fourth a little longer than the third. Mesonotum fuscous yellowish, the median area lighter. Scutellum yellowish, postscutellum darker. Abdomen yellowish brown, the genitalia yellow-ish. Costa reddish straw, subcosta at the basal third, the third vein at
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