124 NEW YORK STATE MUSEUM 



Oligotrophus acerifolius n. sp. 



Male. Length 1.5 mm. Antennae probably nearly as long as 

 the body, sparsely clothed with long hairs, dark brown, 15 segments. 

 Mesonotnm dark brown; scutellum and postscutellum reddish 

 brown, the basal abdominal segments dark brown, the others 

 reddish, spotted with carmine. Genitalia dark brown; legs a 

 variable brown, lighter ventrally; tarsi slightly darker. 



Taken on maple or other trees and shrubs at Albany, N.Y. May 

 17, 1906. 



Type Cecid. 33, N.Y. State Museum. 



Oligotrophus pini n. sp. 



Male. Length 2.5 mm. Antennae longer than the body 

 sparsely clothed with long whitish hairs, dark brown, t6 segments. 

 Head and mesonotum dark brown, the latter reddish posteriorly. 

 Scutellum and postscutellum reddish. Abdomen yellowish red; 

 coxae pale yellowish, femora light brown distally, lighter ventrally; 

 tibiae and tarsi light brown, the former somewhat darker distally, 

 the terminal tarsal segments somewhat darker. 



Taken on pine at Albany, N.Y. May 26, 1906. 



Type Cecid. 87, N.Y. State Museum. 



Oligotrophus cornifolius n. sp. 



Female. Length 1.25 mm. Antennae extending to the 3d 

 abdominal segment, reddish brown, sparsely haired, 13 segments. 

 Mesonotum dark brown, submedian lines and the median area 

 posteriorly yellowish. Scutellum yellowish red with numerous 

 yellowish apical setae; postscutellum yellowish. Abdomen yellow- 

 ish with the basal segments tinged with red, the ist slightly 

 darker. Femora and tibiae yellowish tinged with red; tarsi some- 

 what darker, tinged with red, color somewhat variable. 



Taken onCornus florida at Albany, N.Y. May 18, 1906. 



Type Cecid. 49c, N.Y. State Museum. 



Oligotrophus caryae n. sp. 



Female. Length .75 mm. Antennae extending to the middle 

 of the abdomen, sparsely haired, light brown, 14 segments. Face 

 yellowish; mesonotum black; scutellum and postscutellum reddish 

 brown. Abdomen reddish brown with the segments margined 



