16 THE CANADIAN ENTOMOLOGIST. 



Wings deflexed. Fore wings with four simple oblique veins. Hind 

 wings with one oblique vein. 



This genus has not been previously found in America. The only 

 species known are T. ulmi Geoffr., T. alba Ratzb. and T. rubra Licht. 



I have succeeded in raising T. nlini at St. Louis from eggs sent to me 

 by Mr. Kessler, of Cassel. They seemed to thrive the first season, but 

 did not appear again the next year. 



T. GRAMINIS n. Sp. 



Head and thorax dusky, abdomen dusky or sometimes of a greenish 

 or yellowish tinge. . Antennas dusky, the third joint as long as the three 

 following taken together; joints four and five equal; apical joint a little 

 over half as long as the preceding. Wings hyaline. Subcostal of the 

 hind wing comparatively straight. 



Length of body .08, to tip of wings .12 in. 



On leaves of Aira caespitosa and Agrostis plumosa, enveloped in a 

 thick cotton-like secretion. 



Sept.-Oct. St. Louis, Mo. Springfield, Mo. Neosho City, Mo. 



Pemphigus aceris n. sp. 



Winged female : Head and thorax dusky, abdomen dusky, but appear- 

 ing white from the abundant pulverulent matter. Antennte long, slender ; 

 the apex of the fourth joint reaching the wing insertions ; joints sub- 

 cylindric, scarcely contracted at base, apical unguis not perceptible ; 

 fourth and fifth joints sub-equal, fourth joint not clavate, third joint less 

 than the two preceding taken together. 



Wings sub-hyaline, subcostal and oblique veins brownish black. Stig- 

 mal vein arising behind the middle of the stigma. Venation closely 

 resembling that of P. accrifolii, except that the base of the first discoidal 

 is usually more remote from that of the second discoidal. Length 0.12 

 — 0.15, to tip of wings 0.20 — 0.22 in. On the under side of limbs of 

 Hard Maple, enveloped in woolly matter. Peoria, 111. June (Miss E. A. 

 Smith). A comparison of about fifty species, each, of P. aceris and P. 

 acerifolii, shows that the antennal differences between the two are quite 

 constant. 



