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Indiana University Studies 



brownish rufous; parapsidal grooves very broad at the scutellum, pointed 

 anteriorly, hence long-triangulate in shape, in two varieties more rugose 

 at bottom than in dasydactyh, extending not much more than half way 

 to the pronotum; median groove very short or lacking, often wide at 

 the scutellum; anterior parallel lines fine but more evident, rather finely 

 rugose; scutellum dark to black in the fove^e, foveas rugose at base; 

 abdomen darker rufous, rufo-piceous in part; wing-veins brown, darker 

 than in melanoderma or da^sydaotyli; the areolet of moderate size or 

 large; first abscissa of the radius arcuate-angulate, with a more distinct 

 angle than m dasydactyli; length 2.8-3.7 mm. 



GALL. — Naked, elongate, spindle-shaped. Cylindrical, with a con- 

 stricted base and a greatly elongate, slender tip; entirely straight or 

 curved; entirely naked, smooth, bright green splotched with brown to 

 pui'ple brown, becoming dark brown upon aging. Solid, except for the 

 cylindrical cavity extending from the base two-thirds to the tip, the 

 larval cell not always at the very end of the cavity. On twigs of 

 Querciis chrysolepis. 



RANGE. — California: San Jacinto Mountains to Dunsmuir and 

 Ukiah; probably wherever Q. chrysolepis occurs. 



This species morphologically is closely related to dasy- 

 dactyli, but altho Ashmead stated that the insects of 

 pacificus ''cannot be separated from A. dasydactyli", his types 

 of the two are distinct, showing differences which agree with 

 those in the material I have bred from the two types of galls. 

 Pacificus never bears any of the woolly covering which is 

 characteristic of dasydactyli. 



Adult insects emerge in the spring, a couple of months 

 earlier in southern than in northern California. 



Heteroecus pacificus variety pacificus (Ashmead) 



Andricus pacificus Ashmead, 1896, Proc. U.S. Nat. Mus., XIX, p. 118. 

 Dalla Torre and Kieffer, 1902, Gen. Ins. Hymen. Cynip., p. 64; 

 1910, Das Tierreich, XXIV, pp. 532, 805, 828. Fullaway, 1911, Ann. 

 Ent. Soc. Amer., IV, p. 348. Thompson, 1915, Amer. Ins. Galls, 

 pp. 9, 33. Felt, 1918, N.Y. Mus. Bull., 200, p. 68. 



FEMALE. — Differs from other varieties of the species as follows: 

 Parapsidal grooves rugose at bottom; median groove short or lacking; 

 wing veins somewhat heavier than in the other varieties; areolet quite 

 large, about equilateral; length 3.2-3.7 mm., larger and heavier than in 

 other varieties. 



GALL. — Differs from the galls of other varieties in averaging 

 larger, longer, more slender, the tip about as in subpacificus, shorter 

 than in gracilis. 



KANGE. — California: Cupertino (Fullaway); Placerville, Auburn, 

 Dunsmuir. Probably thruout the central Sierras, from El Portal north, 

 wherever Q. chrysolejns occurs. 



