3l8 CONNECTICUT GEOL. AND NAT. HIST. SURVEY. [Bull. 



Tribe GEOICIINI (New Tribe). 



This tribe is represented by but one genus, Geoica Hart and one 

 species G. squamosa Hart. It is placed in the subfamily PemphT 

 gini only tentatively. A further knowledge of its one species may 

 necessitate its being placed elsewhere. 



Geoica Hart. 



Stem mother unknown. Apterous viviparous females with five- 

 jointed antennae. Permanent sensoria with fringe of celia. 

 Cornicles wanting. Anal plate large, prominent. Rudimentary 

 gonopophyses, two. 



Alate viviparous females with six- jointed antennae. Abnormal 

 specimens with iii and iv grown together. Sensoria oval to sub- 

 circular; irregular in size. Permanent sensoria with fringe of 

 celia. Fore wing with M simple. Hind wing with both media 

 and cubitus present. Cornicles wanting. Rudimentary gono- 

 pophyses, two. Sexuals unknown. 



This genus is represented by a single species G. squamosa Hart 

 which lives on the roots of grasses and herbs. No aerial 

 generations known. 



G. squamosa Hart. 



Rept. Ins. 111., 18, 98, 1894. 



This species feeds upon the roots of grasses and herbs. So far 

 as known no aerial generations are produced. The entire body is 

 covered with coarse hairs which are often spatulate. Wax pore 

 plates not developed. Cornicles wanting. Antennae of alate 

 forms normally six- jointed. Frequently abnormal specimens have 

 only five joints. Permanent sensoria with fringe of celia 

 Rudimentary gonopophyses, two. Sexual forms unknown. 



Tribe TRIFIDINI (New Tribe). 



The members of this tribe feed upon the roots of herbs and 

 grasses. No aerial generations are known. Body covered with 

 line, simple hairs. Wax pore plates not developed. Cornicles 

 wanting. Antennae of alate forms normally six-jointed. Per- 

 manent sensoria without celia. Rudimentary gonopophyses want- 

 ing. Sexuals so far as known, beakless, females laying but one 

 Qgg. Two genera are placed in this tribe. A further knowledge 

 of these may show them to represent but a single genus. For the 

 present, however, it appears best to retain both. 



Key to Genera. 



Media and cubitus of hind wing rising from same point. Apterous 

 viviparous female with five-jointed antennae Trifidaphis, p. 319 



Media and cubitus of hind wing with bases remote. Apterous 

 viviparous female with six-jointed antennae Tullgrenia, p. 319 



