426 JOURN'AL OF ECONOMIC ENTOMOLOGY [Vol. 10 



Besides the proportions, the distinguishing characters of this 

 species are the uniform black antennae and the absence of markings 

 upon the abdomen. The most important character, however, is nature 

 of the tibiae. What appears to be the same species as mucidus was 

 described by Fitch as Aphis pinicolens. (1851, p. G6.) The type of 

 this species in the U. S. National Museum is in very poor condition. 

 The tibiae show the large number of minute pore-hke structures met 

 with in mucidus. The tibiae, however, are not uniform black as in the 

 type of mucidus and in the collected material of that species. Only 

 their tips are dark brown. This may be due to the fading of the type 

 specimen. No collected specimens which agree in all details with this 

 type of pinicolens have been seen by the wiiter. He therefore with- 

 holds judgment in regard to the use of the name pinicolens. 



Euceraphis brevis n. sp. Taken on "cut-leaf" white birch, Middle- 

 town, Conn., May 3, 1906, by Morris B. Cra^vford, Bureau of Ento- 

 mology No. 9541, and on Betula sp., Ithaca, N. Y., May 15, 1911 by 

 E. M. Patch, Me. Exp. Sta. Ace. No. 20-11. 



Alate Viviparous Female: Morphological Characters: Antennal segments as 

 foUows: III, 1.2 mm.; IV, 0.672 mm.; V, 0.528 mm.; VI, (0.176 + 0.128 mm.). 

 Segment III, with 18 or 20 sensoria close together upon the basal third of the 

 segment. Distal segments imbricated; width of head across the eyes about 0.64 

 mm.; vertex with two slight projections above abdomen with large lateral pro- 

 tuberances. Cornicles about 0.128 mm. long. Anal plate entire; length from vertex 

 to tip of Cauda 2.4 mm. 



Color Characters: General color greenish; antenna? shaded with dusky becoming 

 black on the distal segments; legs with the tarsi and distal extremities of the tibiifi 

 black. The distal extremities of the femora are also sometimes more or less black. 



Described from alate viviparous females in balsam mounts. 

 Type in U. S. National Museum. Cat. No. 20342. 



Euceraphis lineata n. sp. Taken on birch at Durham, N. H., Oct. 

 19, 1903, by C. M. Weed, Bureau of Entomology No. 9315 D., and on 

 Betula populifolia, Orono, Me., July 21, 1906, by E. M. Patch, Me. 

 Ace. No. 83-06. 



Alate Viviparous Females: Morphological Characters: Antennse with the 

 following measurements: Segment III, 1.68 mm.; IV, 1.36 mm.; V, 0.928 mm.; VI 

 (0.096 mm. + 0.4 mm.). Segment III wdth about 25 sensoria on the basal 0.64 mm. 

 Width of head across the eyes 0.64 mm.; vertex without projections, antennae rather 

 close together. Length from vertex to tip of cauda 3.12 mm.; length of forewing 4.5 

 mm.; anal plate rounded or very slightly indented. 



Color Characters: General color greenish yellow; antenna; duskj' with blackish 

 distal annulations on the segments; tarsi, distal extremity of labium and distal 

 extremity of the femora and tibia; dark brown. The tibia; has, moreover, a longitu- 

 dinal dark brown stripe extended for nearly its entire length. Abdomen without 

 dark browTi markings Vjut with the eyes of the young showing as dark brown spots. 



Described from specimens in balsam mounts. 

 Type in U. S. National Museum. Cat. No. 20343. 



