﻿AMERICAN CYNIPID GALL WASPS — WELD 339 



tarsus. Using width of the head as a base, the length of mesoiiotum 

 ratio is 1.4 ; antenna 2.2 ; wing 3.7. Length 2.2 mm. 



Type.—JJ.S.^M. No. 60126: Type. 



Host. — Quercus emoryi. 



Gall (pi. 17, fig. 22). — A stalked, fusiform, pip gall beside young 

 acorns July to October. Spindle shaped, brown, 3 by 5 mm. tapering 

 at both ends, cavity large, wall thin. 



Habitat. — The type was reared from a gall collected October 4, 1935, 

 at Cherry, Ariz., by Mrs. N. W. Capron. A paratype emerged April 

 14, 1951, from a gall she collected at Prescott, Ariz., on September 

 20, 1950. Galls have been seen at Oracle, Ariz., and in Burro Moun- 

 tains in New Mexico; seen also on Quercus hypoleuca at Patagonia, 

 Bisbee, and in Huachuca and Chiricahua Mountains in Arizona. 



CALLIRHYTIS HOPKINSI. new species 



Agamic female. — Amber; foveae, propodeum, middle and hind 

 tibiae and tarsi infuscated. Head granulate, dull; from above as 

 broad as thorax, cheeks broadened behind eyes, occiput concave ; from 

 in front broader than high, malar space .6 eye w^ith a groove, antennae 

 14-segmented, first four as 23(9) : 9(7) : 28(6) : 21 ; last 17(6). Meso- 

 scutum granulate, covered uniformly with very short hairs, parapsi- 

 dal grooves percurrent, a median evident posteriorly. Sculpture of 

 disk coarser and somewhat trans^^erse, in profile strongly humped back 

 of septum. Mesopleuron dull, granulate, short-pubescent. Wing 

 hyaline, dotted, nonciliate, veins beyond second cross-vein clear, first 

 abscissa of radius angulate, heavy, areolet small. Hind femur broad- 

 est back of middle. Claws simple. Carinae on propodeum but 

 slightly bent, enclosed area twice as broad as high. Abdomen length 

 to height to width as 37 : 31 : 31 : lengths of tergites along dorsal curv- 

 ature as 95 : 26 : 24 : 10 : 12 : 13. Ventral spine 8 times as long as broad, 

 shorter than hind metatarsus. Using width of the head as a base the 

 length of the mesonotum ratio is 1.3 ; antenna 2.5 ; w^ing 3.5 ; ovipositor 

 2.4. Length 3.1-4.2 mm. Average of 154 specimens 3.89 mm. 



Differs from agamic Callirhytis operator (Osten Sacken) in having 

 a shorter ventral spine, 14-segmented antennae and in its lighter 

 color. 



Types. — U:S.N.M. No. 60127 : Type and 40 paratypes. Paratypes 

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



Host. — Qu£rcus inibincaria. 



Gall (pi. 17, fig. 14) . — A "pip" gall found in fall on young acorns of 

 current season, green when fresh and secreting honey dew, becoming 

 brown later and dropping to the ground. Short-cylindrical, 4—7 mm. 

 broad by 2-4 mm. high, the larval cell central, the wall thick. Differs 

 in shape and structure from all other known "pip" galls. 



