Kinsey: Studies of Ci/ynpidx 



118 



Plagiotrichus chrysolepidicola variety kellogj>i (Fullaway) 



CynipR kelloggi Fullaway, 1911, Ann. Ent. Soc. Amer., IV, pp. 345, 370. 

 Felt, 1918, N.Y, Mus. Bull., 200, p. 56. 



FEMALE. — Shows the following characters in addition to those 

 common to all varieties of the species : Color generally a rather light 

 rufous brown; antennae bright rufous, the apical half brown; parap- 

 sidal grooves entirely indistinct but traceable for most of the mesonotal 

 length; median groove traceable for most of the mesonotal length; 

 anterior parallel lines rather evident, continuous, smooth; mesopleurae 

 in large part, almost, but not entirely, smooth, shining, more or less 

 naked, a distinctly rugose area medianly, bright rufous brown; foveae 

 not large, more or less smooth at bottom ; abdomen darker only postero- 

 dorsally and less so ventrally, longer than high; legs including the coxae 

 bright rufous brown, hardly darker on the hind tibas ; areolet very small ; 

 cubitus faint at the basalis; length 2.0-3.0 mm., averaging smaller. 



GALL. — Quite similar to the galls of most of the varieties. More or 

 less rounded, up to 25. mm. in diameter and 40. mm. long, averaging- 

 nearer 10. mm. in diameter by 20. mm. long. Internally quite solid, the 

 larval cells more or less closely embedded. On Qiierciis Douglasii. 



RANGE. — California: Cupertino, Stanford University, Frohm, 

 Paso Robles, San Jose (Fullaway) ; Palo Alto, Byron, Oakdale, Three 

 Rivers, El Portal. Probably from Palo Alto and El Portal south 

 wherever Q. Douglasii occurs. 



TYPES. — Females and gall at Stanford University; females at the 

 U.S. National Museum and in m.y collection. 



The above redescriptions are based on paratype females 

 from Paso Robles, and on galls from the several localities in 

 which I collected this species. I have critically examined in- 

 sects only from Paso Robles, and all of the other locality rec- 

 ords, based on galls only, are therefore open to question. 



Galls collected in March and April were empty; young 

 galls (not certainly of this variety) were just beginning 

 growth at El Portal on March 26, 1920. If the insects over- 

 winter in the galls they emerge early in the spring. The 

 variety is probably confined to Quercus Douglasii, over the 

 southern part of its range, for in the more northern Sierras, 

 and north of San Francisco, this same oak bears different 

 varieties, conipositiis and atricinctus, respectively. Galls were 

 collected which had been broken into by mice or other small 

 mammals in search of the insects as food. 



The insect, in its color, size, smoother mesopleuras, 

 elongate abdomen, and more or less discontinuous cubitus, 

 shows closest relationships to variety diniinuens. It differs 

 from diniinuens mainly in having complete parapsidal grooves, 



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