﻿AMERICAN CYNIPID GALL WASPS — WELD 323 



of mesonotum ratio is 1.3; antenna 2.6; wing 4.7. Length 1.75-2.15 

 mm. Average of five specimens 1.90 mm. Differs from T . coquilletti 

 Ashmead in having fully developed wings, from amber-colored T. 

 va^dmifoliae (Ashmead) in having cheeks not broadened behind the 

 eyes. 



Types. — U.S.N.M. No. 60110: Type and paratype. Paratypes also 

 in A.M.N.H. and C.A.S. 



Host. — Quercus chrysolepis. 



Gall (pi. 17, fig. 20). — Tan colored, circular, 6-8 mm. in diameter 

 by 1 mm. high, single or in two's or three's, attached to midrib on 

 upper or lower side of leaf in the fall. Sparingly hairy, thin walled, 

 with an eccentric ellipsoidal cell inside held in place by radiating fibers. 



Tlabitat. — The types are from galls collected at Idyllwild, Calif., 

 Xovember 9, 1948. Both living and dead adults were found in the 

 galls when they were cut open, February 9, 1949. Galls have been 

 seen in the San Bernardino, San Gabriel, and Santa Lucia Mountains, 

 in Giant Forest, Big Basin, on Mount St. Helena, and at Ukiah, Calif. 

 Fresh galls are fully grown by mid-June. 



TRICHOTERAS ROTUNDULA, new species 



Female. — Particolored, black and brown. Head coriaceous; from 

 above transverse, cheeks not broadened behind eyes; from in front 

 malar space one-half eye, without groove, faintly striate; antennae 

 12-segmented, first four segments as 10 : 8 : 15 : 13-last 11. Meso- 

 scutum broader than long, not quite smooth, with uniformly dis- 

 tributed pubescence, parapsidal grooves percurrent, a median groove 

 present posteriorly. Scutellum punctate, foveae smooth. Meso- 

 pleuron bare and smooth above, pubescent below. Wing pubescent 

 and ciliate, veins slender, brown, first abscissa of radius arcuate, radial 

 cell elongated, areolet small. Claws toothed. Carinae on propodeum 

 diverging below. Abdomen as long as head plus thorax, lengths of 

 tergites on dorsal margin as 65: 13:4, tergite II foliiform. Ventral 

 spine slender, as long as hind metatarsus. Using width of head as a 

 base the length of mesonotum ratio is 1.3; antenna 2.4; wing 4.6. 

 Length 2.0-2.05 mm. Described from three specimens. Differs from 

 T. perfiilvuvi in having a longer striate malar space and a longer 

 ventral spine. 



Types.— U.^.'^.M. No. 60111 : Type. Paratype in C.A.S. 



Host. — Quercus chrysolepis. 



Gall (pi. 16, fig. 2). — A midrib cluster of a few globular galls, 

 usually on the under side of a leaf in the fall. Covered with short 

 straight hairs when young and green, later bare, smooth, tan, up to 

 2.7 mm. in diameter with a central cell 1.5 by 1.2 mm. supported by 

 stout radiating fibers. 



967604—52- 2 



