Kinsey: Studies of Cynipidse 



93 



way, 1911, Ann. Ent. Soc. Amer., IV, p. 349. Thompson, 1915, 

 Amer. Insect Galls, pp. 10, 32. Felt, 1918, N.Y. Mus. Bull., 200, 

 p. 72. 



FEMALE. — Shows the following characters in addition to those 

 common to all species of the genus : Color of head and thorax very dark 

 rufous brown, black in part; parapsidal grooves very broad at the scutel- 

 lum, pointed anteriorly, hence long-triangulate in shape, extending not 

 much more than half way to the pronotum; median groove distinct tho 

 short, fairly wide at the scutellum; anterior parallel lines very distinct; 

 scutellum rather finely rugose, basal foveae of scutellum rugose, broader 

 than in other varieties; mesopleurae irregularly rugoso-aciculate pos- 

 teriorly; abdomen rufo-piceous, piceous black dorsally; wing veins only 

 moderately heavy; areolet moderately large; first abscissa of the radius 

 strongly angulate, without a projection; length 3.5-3.7 mm., the whole 

 build distinctly larger than in any other variety. 



GALL. — Elongate, scurfy, like a date seed in shape. Cylindrical, 

 averaging 6. mm. wide by 20. mm. long, bluntly, short, and conically 

 pointed apically, slightly tapered basally, broadest near the apex; cov- 

 ered with a dense, very short, scurfy pubescence, rich golden brown, 

 weathering dull brown to black. Monothalamous. Internally with a 

 single, cylindrical, central cavity 2. mm. wide extending from the base 

 almost to the tip of the gall; a larval cell, 1.7x3.5 mm., lies in the 

 cavity, usually nearer the apical end. Sessil, on twigs of Qiiercus 

 chrysolepis. 



RANGE. — California: Cupertino (FuUaway) ; Los Gatos (Mc- 

 Cracken coll.) ; Redwood Park (in Stanford Univ. coll.) ; Boulder Creek, 

 Placerville. 



TYPES. — 2 females, 7 galls. Holotype female, paratype galls in 

 The American Museum of Natural History; paratype female and galls 

 with the author; paratype galls at Stanford University and the U.S. 

 National Museum. Labelled Placerville, California; March 30, 1920; 

 Kinsey collector. 



Adults were almost mature in the galls at Placerville, 

 March 30, and emerged some time later. 



Material of this species in several museums is labelled 

 Andricus dasydactyli, and this gall largely agrees with the 

 gall described for that species by Ashmead. But the insect 

 dasydactyli comes from galls covered with long wool, and is 

 very distinct from melanoderma adults ; the latter species has 

 been heretofore undescribed. Weld sends me galls from the 

 Santa Catalina Mountains of Arizona, occurring on Quercus 

 ohlongifolia; the galls are similar to those of melanoderma, 

 but I have not yet seen the insects. 



Heteroecus pacificus (Ashm^ead) 



FEMALE. — Shows the following characters in addition to those 

 common to all species of the genus: Color of head and thorax rich 



