3l6 CONNECTICUT GEOL. AND NAT. HIST. SURVEY. [Bull. 



T. graminis Monell. T. colophoidea Howard. T. ulmicola 

 Gillette. 



Can. Ent., xiv, i6, 1882. 



Producing a cock'scomb-shaped gall on the dorsal side of leaf 

 of Ulmus americana which is the habitat of the spring generations. 

 The summer generations live upon the roots of grass (Leersia, 

 Aira and Agrostis). For a discussion of this species versus 

 Colopha ulmicola Fitch see Patch (1910a). 



On elm, New Haven, 3 Aug., 1909 (A. I. B.). 



Colopha Monell. 



This genus has characters suggestive both of Eriosoma and 

 Pemphigus. 



Stem mother with four- jointed antennae. Young of stem 

 mother all acquire wings. Third generation apterous. Antennae 

 five- jointed. 



Alate viviparous females with six- jointed, annular antennae. 

 Sensoria narrow, transverse. 



Fore wing with M once forked. Hind wing with media only. 

 Sexuals, small and beakless. Antennae four- jointed. Females 

 laying but one egg. C. ulmicola, the only species of the genus, 

 produces true galls on the leaves of the winter host. Summer 

 generations produced on roots of grass. 



C. ulmicola (Fitch). Byrsocrypta ulmicola Fitch. Colopha 

 eragrostidis Middleton. 



Nox. and Ben. Ins. N. Y., v, 843, 1859. 



Forming cock'scomb-like galls on the upper surface of leaves 

 of Ulmus americana and migrating to roots of grass for the 

 summer. A discussion of this insect was given by Patch (1910a). 



Gobiashia Matsumura. 



Like the other genera of the tribe Tetraneurini this one possesses 

 the characters of both Eriosoma and Pemphigus. 



Stem mother with four- jointed antennae. Wax pore plates 

 feebly developed, composed of irregular area without chitinous 

 border. Young of stem mother all acquire wings. Third 

 generation apterous. 



Alate forms with six- jointed antennae. Joints annular. Sen- 

 soria linear, transverse nearly encircling joints. 



Venation of fore wing variable. Colorado material has 47 

 individuals with M of both fore wings once forked, loi with M 

 of but one wing forked and 70 with M of both wings simple. 



Hind wing always with both media and cubitus present. Wax 

 pores most strongly developed in pupae. These are composed of 

 a central area surrounded by a single row of facets. Sexuals 

 unknown. 



