88 Psyche [August 



FF. Narrow lateral expansion of the pronotum sharply 

 demarked and most commonly pale; not widened 

 between the two lobes which are poorly differentiated 

 from each other, merely posteriorly lightly depressed 

 and sparsely punctate; pronotunl transverse, the two 

 sides subparallel. Head submerged to eyes; width of 

 head across eyes much narrower than across anterior 

 submargin of pronotum where the angles are rather 

 abruptly rounded. Antennae more slender. Poste- 

 lior tibia with long rigid bristles. Basal segment of 

 posterior tarsus a little longer than second and third 

 together. Fore femora with several small subapical 

 tubercles. Brachypterous and macropterous forms. 

 (To include Trapeziis Dist.) Cryphula StaL 



ANOTHER TOXOPTERA FEEDING ON SEDGE (HOMOP- 

 TERA; APHIDIDiE). 



By a. C. Baker, 

 Washington, D. C. 



During the summer of 1916, there appeared on the sedges in a 

 little marsh at East Falls Church, some dark colored apterous 

 aphids. These were kept under observation and some were trans- 

 ferred to rearing cages. From these, sexes and eggs were obtained 

 in the fall. None of the eggs, however, hatched the following 

 spring. Visits to the marsh were made too late to secure a supply 

 of stem mothers. Apterous forms were secured in the second 

 generation and from these alate forms were secured. In the key 

 given by Davis^ this species would fall under aurantii from its color 

 and would be excluded from scirpi by the nature of the hairs present 

 in that species. It is therefore recorded under a new name. 



Toxoptera nigra sp. nov. 

 Alate vivipara. 

 The alate forms began to appear in the rearing cages in the third 

 generation. It is quite possible, however, that lines from a suffi- 

 cient number of stem mothers would show alate forms produced in. 



1 Tech. Ser. No. 25, Pt. I, p. 8. U. S. D. A. Bur. Ent. 



