REPORT OF THE STATE ENTOMOLOGIST I906 I23 



Oligotrophus rhoinus n. sp. 



Male. Length .75 mm. Antennae a little longer than the body, 

 sparsely haired, light brown, 13 or 14 segments. Mesonotum dark 

 brown ; scutellum light brown with sparse apical setae ; postscutellum 

 yellowish brown. Abdomen a somewhat variable yellowish brown, 

 the anterior four segments irregularly marked near the median line 

 with dark brown. Legs pale yellowish brown; tarsi darker. 



Taken on sumac at Albany, N.Y. June i, 1906. 



Type Cecid. 94, N.Y. State Museum. 



Oligotrophus thalactri n. sp. 



Male. Length 1.5 mm. Antennae shorter than the body, 

 sparsely haired, light brown, yellowish basally, 14 segments. Face 

 yellowish; mesonotum light yellowish brown, submedian lines 

 yellowish. Scutellum and postscutellum pale yellowish. Abdomen 

 yellowish, sparsely clothed with light hairs. Coxae and basal 

 portion of femora pale yellow, the remainder of the legs fuscous 

 yellow. 



Taken on early meadow rue at Albany, N.Y. June i, 1906. 



Type Cecid. 98, N.Y. State Museum. 



Oligotrophus nodosus n. sp. 



Male. Length 1.25 mm. Antennae extending to the middle of 

 the abdomen, sparsely haired, dark brown, 14 segments. Face and 

 mesonotum dark brown, abdomen reddish brown, dorsal incisures 

 orange-brown. Legs yellow with reddish tints; tibiae and tarsi 

 fuscous apically. 



Taken on hornbeam or water beech near pine at Albany, N.Y. 

 April 10, 1906. 



Type Cecid. 10, N.Y. State Museum. 



Oligotrophus tsugae n. sp. 



Male. Length 1.5 mm. Antennae extending to the middle of 

 the abdomen, rather thickly haired, dark reddish brown, 15 seg- 

 ments. Face dark reddish brown; mesonotum dark brown; 

 scutellum, postscutellum and abdomen dark reddish. Legs a 

 nearly uniform pale straw, lighter ventrally; tarsi darker. 



Taken on hemlock at Lake Clear, N.Y. June 7, 1906. 



Type Cecid. 165, N.Y. State Museum. 



