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Indiana University Studies 



appear to be older than the Rocky Mountains, having changed 

 only slightly since they were isolated. 



Lutescens is separated from variabilis by the smaller 

 areolet and the darker cloud on the radial cell in the female, 

 and by the peculiarly heavier first abscissa of the radius in the 

 male. 



Disholcaspis pattersoni, new species 



FEMALE. — Mostly bright brown rufous and darker; abdomen naked 

 with large patches of hairs latero-basally ; areolet large; length about 

 3.5 mm. HEAD: Not quite as wide as the thorax, greatly enlarged 

 behind the eyes ; dark brownish rufous, almost black below the inser- 

 tions of the antennae, around the mouth, and on the tips of the mandi- 

 bles; finely rugoso-punctate, more rugose on the face; moderately dense 

 with long hairs, hairs fewest on vertex and cheeks. Antennae wholly 

 black, or basal segments either rufous or dark ruf o-piceous ; with 13 

 (or 14) segments, the third distinctly longer than the fourth, the last 

 more than twice the length of the preceding (or incompletely divided). 

 THORAX: Mesonotum rich brownish rufous, black on the anterior 

 parallel and lateral lines, sometimes black antero-medianly ; distinctly 

 rugoso-punctate, not densely covered with long hairs; parapsidal grooves 

 deep, moderately broad posteriorly, extending half the length of the 

 mesonotum; median groove lacking; anterior parallel lines rather 

 smoother, reaching half way to the scutellum; lateral lines broad, 

 smooth, naked; scutellum brownish rufous, blackish toward the base, 

 rugose, hairy, about as broad as long, elevated, the depression at base 

 more finely rugose, without distinct foveee; pronotum brownish rufous, 

 shallowly punctate and hairy laterally; mesopleuras wholly brownish 

 rufous, irregularly punctate and hairy. ABDOMEN: Bright to dark 

 rufous, brightest and lightest basally, smooth and shining, only very 

 microscopically punctate, entirely naked except for large patches of 

 hairs latero-basally, and the hairs on the ventral spine; as high or 

 higher than long, the second segment not covering half the abdomen, 

 not produced dorsally but with the ventral edges of all the segments 

 well rounded. LEGS: Rufous, also rufous on the coxae, tarsi dark, tips 

 darkest, rugoso-punctate, hairy; claws strong, toothed. WINGS: Clear, 

 ciliate, veins deep brown; areolet large; cubitus extending only a little 

 more than half way to the basalis; radial cell open, wide, the second 

 abscissa of the radius strongly curved distally, neither radius nor sub- 

 costa reaching the edge; first abscissa of the radius strongly angulate, 

 with a short but distinct projection. LENGTH: 3.0-3.7 mm. 



GALL. — Large, bluntly conical, bullet gall, in compacted clusters 

 about the twig. Each gall primarily a true cone, but distorted by pres- 

 sure of surrounding galls, a slight projection basally extending into the 

 twig, and a slight overlapping of the primarily circular base about the 

 twig; dark purple when fresh, becoming rich brown, darker at the tips; 

 smooth; averaging 8. mm. in diameter by 12. mm. high. Internally 

 solid, the larval cell oval, 2. x 4. mm., with a distinct, shell-like wall, not 



