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 



