80 H. F. BASSETT. 



ANDRICUN Hartig. 

 1. A. cicatricula Basselt. 



Cynips cicatricula (gall) Bassett, Cau. Ent. xiii, p. 101. 



I described the gall of this species in 1882 and published it in the 

 " Canadian Entomologist" of that year, but found that the gall-flies, 

 of which 1 had reared a large number, were I'uined by dampness. 

 I here republish the descrii)tion of the gall and add a description of 

 the gall-flies. 



" Polythalamous galls on the midvein of the leaves of Quercus 

 alba never more than one on a leaf, and situated sometimes at the 

 base, but usually from one-fourth to one-half way from the base, 

 rarely above the middle. They project one-third below and two- 

 thirds above the surface of the leaf; they are rounded on the under 

 and cone-shaped on the upper surface of the leaf. The gall is solid 

 and somewhat fibrous, and in its shorter diameter measures about 

 one-half inch, and in the longer from five- to seven-eights of an inch. 

 The larval cells radiate in all directions from the centre of the gall 

 and are quite numerous. There is, at or near the summit of the 

 cone, a small scar or indentation, which is always present, and so 

 characteristic as to suggest the name I have given to the species." 



Gall-flies. — Male. — Head black, vertex microscopically reticulated : antennse 

 lontr, with fifteen distinct joints, first and second dark reddish brown, remainder 

 light, shining yellowish brown, first joint short, heavy, second short, ovoid: 

 third one-fourth longer than the first two, slightly curved, but scarcely incised ; 

 fourth to the fourteenth subequal and each as long as the first and second taken 

 together, last short, cone-shaped. Thorax black, shining ; niesothorax rounded 

 and with regular transverse reticulations; two short, faint parallel lines; parap- 

 sidal grooves entire, slender and almost parallel, but slightly convergent towards 

 the scutellum ; scutellum finely rugose, foveffi large, shining. Abdomen small, 

 the first segment longer and more plainly seen than usual, second very long, 

 nearly round, polished, black, only the edge of the remaining ones visible. Legs : 

 posterior pair dark brown with pale joints, the anterior pairs light reddish brown, 

 ungues two-toothed. Whigs hyaline, veins slender, first and second transverse 

 and the submargiual brown, the rest nearly or quite colorless; areolet small, 

 distinct; cubitus disappearing half way to the first transverse, radial area open 

 and of medium width. Length: body, .07 inch.; wings, .10 inch.; antennae, 

 .08 inch. 



Female. — Head and thorax as in the male; antennae with thirteen joints of a 

 clear light brown color, growing somewhat dusky in the last few joints Abdo- 

 men shining black, excei)t the venter, which is a clear translucent brown ; second 

 segment long, broad; sheath of the ovipositor extends above the dorsum as in 

 A. operator O. S., and in all the species that belong to the inquilinous genus 

 Ceroptes. Lej/s ail dark reddish brown. TFijigfs as in the male. Length : body, 

 .10 inch. ; wings, .12 inch. ; antennte, .07 incli. 



Connecticut. 



