﻿AMERICAN CYNIPID GALL WASPS — WELD 341 



CALLIRHYTIS FURVA, new species 



Female. — Reddish brown with clypeiis, antennae, occiput, anterior 

 and lateral line areas, propodeuin, tibiae, tai-si, and abdomen in part 

 inf uscated ; foveae and mesopleuron black. Head from above trans- 

 verse, cheeks broadened behind eyes; from in front broader than high, 

 malar space one-third eye, not striate, antennae filiform, 14-segmented. 

 Mesoscutnm coriaceous, with scattered hairs, parapsidal grooves per- 

 current. Scutellum disk coriaceous anteriorly, rugose behind, the two 

 basal foveae sharply outlined. Mesopleuron bare and smooth under 

 hind wing, striate anteriorly, pubescent below. Wing pubescent and 

 ciliate, veins brown, areolot small. Claws simple. Carinae on pro- 

 podeum parallel above, bowed out below, enclosed area broader than 

 high. Abdomen compressed, longer than head plus thorax, gibbous 

 below petiole in side view, knifelike back of tergite II, lengths of 

 tergites along dorsal curvature as 73 : 20 : 17 : 15 : 10 : 4 ; tergite II 

 smooth, exposed parts of rest punctate. Ventral spine shorter than 

 hind metatarsus, tip of ovipositor hooked. Using width of the head as 

 a base, the length of mesonotum ratio is 1.3; antennae 2.3; wing 2.9; 

 ovipositor 4.8. Length 2.15-3.65 mm. Average of 46 specimens 2.91 

 mm. 



Differs from Callirhytis infuscata ( Ashmead) in being particolored, 

 larger, in having setigerous punctures between parapsidal grooves and 

 a longer ovipositor. 



Types. — U.S.N.M. No. 60129: Type and seven paratypes. Para- 

 types also in A.M.N.H., C.M.N.H., A.N.S.P., C.A.S., and M.C.Z. 



Host. — Quercus fdlustris. 



Gall (pi. 17, fig. 21). — Small, somewhat globular galls, 3-4 mm. in 

 diameter covered with short, straight, stiff brown hairs, scattered along 

 midrib or main veins on upper side of leaf in the fall and dropping off 

 singly when mature. The hairs do not weather away during winter. 

 Similar to galls of G. infuscata (Ashmead) on Quercus laevis in 

 Florida. 



Habitat. — The types were reared from galls collected on ground 

 at East Falls Church, Va., on October 12, 1943. Adults emerged 

 March 20, 24, 1945, and one was cut out alive on January 2, 1946. 

 Others emerged March 20, 29, 1948, from galls collected September 15, 

 1946. One was cut out December 1, 1919, from a gall collected at 

 Ironton, Mo., on October 15, 1917. Similar galls have been noted on 

 nine other species of red oaks. 



CALLIRHYTIS SUBCOSTATA, new species 



Female. — Black; sides of pronotum and legs in part amber. Head 

 coriaceous; from above transverse, cheeks broadened behind eyes, 



