No. 34-] HEMIPTERA OF CONNECTICUT: APHIDIDAE. 317 



G. ulmifusus (Walsh). Pemphigus ulmifusus Walsh. Schizo- 

 neura n. sp. Sanborn (1904, pp. 28-29). 



Am. Ent., i, 109, 1869. 



So far as verified records go the spindle-shaped sack-like galls 

 of this aphid are found on Ulmus pubescens Walt. 



Tribe MELAPHINI. 



The members of this tribe are for the most part true gall pro- 

 ducers ; however, one species spends at least a part of the year on 

 moss. While the tribe suggests both Eriosomatini and Pemphi- 

 gini it is quite distinct from both. A further knowledge of this 

 tribe may show it to be wrongly placed in the subfamily 

 Pemphiginae. 



Both alate and apterous individuals are produced in the galls. 

 In all probability the young of the stem mother are all apterous. 

 Wax production moderately developed. Wax pore plates of 

 apterous individuals variable. Those of the alate forms composed 

 of subcircular facets of irregular size which are loosely arranged. 

 Cornicles lacking. Antennae of alate forms five- or six-jointed. 

 Sexuals unknown. 



Melaphis Walsh. 



Stem mother unknown. Apterous forms produced in the galls 

 have five- or six-jointed antennae. Wax pore plates variable. 

 Those of the abdomen composed of several irregularly-shaped 

 facets of about equal size. Plates on head and thorax composed 

 of from one to five facets. When consisting of from three to 

 five facets these are arranged into a circular plate. 



Alate form with five- or six- jointed antennae. Sensoria broadly 

 linear, nearly encircling joints, or narrowly oval and not encircling 

 the joints. Stigma of fore wing prolonged, pointed beyond the 

 stigmal vein. M of fore wing simple. Hind wing with media 

 and cubitus both present. Wax pore plates on head, prothorax 

 and abdomen composed of subcircular facets loosely arranged. 



One species of this genus produces galls on the leaves of the 

 host. The other lives on mosses so far as known. 



Key to Species. 



Antennae of alate viviparous females six- jointed. Sensoria broadly 

 linear, nearly encircling joints rhois 



Antennae of alate viviparous females five- jointed. Sensoria nar- 

 rowly oval, not encircling j oints minutus 



M. rhois (Fitch). Byrsocrypta rhois Fitch. 



Jour. N. Y. Agr. Soc., xvi, 73, 1866. 



See Baker (1917J). 

 M. minutus Baker. 



Ent. News, xxx, 194, 1919. 



