Kinsey: Studies of Cynipidse 



139 



tinct in structure. I cannot be certain that these are not 

 abnormal galls of Plagiotrichus perdens (Kinsey), but I think 

 not, for they never show a trace of the broken bark character- 

 istic of perdens, and they occur on agrifolia which perdens 

 does not appear to inhabit. The galls are very much alike on 

 the three oaks. In general the insects emerge some weeks 

 after the emergence of suttonii in the region. 



I have these galls from Quercus agrifolia at Santa 

 Barbara, Gaviota, Palo Alto, and Mt. Tamalpais ; from Q. 

 Wislize^iii at Oakdale, El Portal, Merced Falls, Auburn, and 

 Oroville; and from Q. Kelloggii at Descanso, Placerville, and 

 Ukiah. 



Trigonaspis ornata, new species 



FEMALE. — Almost wholly bright yellow rufous; antennae distinctly 

 slender; scutellum with a smooth depression at base; all wing veins 

 heavy, including the cubitus. HEAD : Almost as wide as the thorax, 

 eyes extending slightly beyond the cheeks; rufous yellow, tips of mandi- 

 bles brown; finely rugose, only slightly more so on the face; sparsely 

 hairy. Antennae long, distinctly slender, light brown, the two basal 

 segments straw yellow; finely pubescent; with 14 segments, the third 

 slightly longer than the fourth, the last almost twice as long as the 

 preceding. THORAX: Entirely bright yellow rufous; mesonotum 

 almost smooth, shining, naked of hairs; parapsidal grooves prominent, 

 deep, continuous to the pronotum, gradually convergent posteriorly, fairly 

 proximate at the scutellum, widely divergent only finally at the pro- 

 notum; median groove, anterior parallel, and lateral lines lacking; 

 scutellum somewhat elongate, rugose, hairy, a smooth, arcuate, fairly 

 broad furrow at the base, only incompletely divided into foveae; pro- 

 notum at the sides almost smooth, finely punctate and sparsely hairy; 

 mesopleurae rugose beneath the tegulae, otherwise almost smooth, finely 

 punctate and very sparingly hairy. ABDOMEN: Of the same bright 

 yellow rufous as the thorax, darker to almost black ventrally; practically 

 smooth, naked except for a few hairs latero-basally and on the posterior 

 segments; longer than high, second segment not covering quite half 

 the abdomen, not produced dorsally, ventral edges of all the segments 

 well rounded, hind edges oblique. LEGS: Entirely clear yellow, tips 

 of tarsi dark, finely hairy; tarsal claws heavy, toothed. WINGS: 

 slightly yellowish ; finely ciliate on the margins, veins heavy, rich, dark 

 brown; areolet of moderate size; cubitus reaches the basalis; radial 

 dell open, bounding veins not quite reaching the edge but extending 

 parallel with it for a very short distance; second abscissa of the radius 

 moderately curved; first abscissa heavy, strongly angulate, infuscated, 

 the brown cloud extending along the subcosta and covering a small part 

 of the base of the radial cell. LENGTH : 3.5 mm. 



MALE. — Differs from the female as follows: Eyes larger, pro- 

 truding distinctly on the sides, head wholly black except the yellow 



