OF WASHINGTON. 21 



Male. Rostrum a little shorter than in ?, moderately and nearly 

 uniformly arcuate, more thickened at extreme base and distinctly 

 punctate. Antennae inserted at middle, scape about as long as first 

 four funicular joints. Fifth ventral segment with a very small apical 

 bare area, showing margin, and with a tuft of hairs each side. Pygidium 

 with long tuft of yellowish hairs. 



Dimensions. Length, 5.5-7.5 mm. ; width, 2.8-3.2 mm. ; rostrum $ 3.5- 

 4.0 mm., c? 2.8-3.5 mm - 



Habitat. Ithaca, N. Y. (Chittenden) ; Ann Arbor, Mich. 

 (Hubbard & Schwarz) ; Kanawha, W. Va. (Hopkins) ; 

 Allegheny, Pa. (Hamilton) ; New Jersey; Hey worth, 111., Sept. 

 31 (Wolcott) ; Cook Co., Ills. (Blackwelder) ; Okoboji, la. 

 (Wickham) ; West Point, Nebr. ; Stonewall, I. T. ; Jackson, 

 Miss.; Memphis, Tenn. ; Goldsboro, N. C. (O. Slitter); 

 Pleasant Hill, Ala., Oct. 15 (J. B. Rudolph) ; Auburn, Ala., 

 Oct. 1 8 (E. M. Wilcox). 



Type. No. 11996, U. S. National Museum. 



The above description was drawn from a good series from 

 Ithaca, N. Y. Specimens from other localities exhibit con- 

 siderable variation as regards the rostral structure, which is 

 seldom so abruptly recurved at the apex as in the type. This 

 species is known in collections generally as " uniformis " and 

 is sometimes labelled " obtusus." 



Observed by the writer in copula and in great numbers on 

 two trees of Quercus alba, always in company with Balaninus 

 quercus, at Ithaca, N. Y., September 1-8. Taken by Dr. 

 A. D. Hopkins in West Virginia on yellow oak, Quercus 

 velutina (tinctoria). It also infests the acorns of other oaks, 

 including most biennials. 



Balaninus baculi var. curtus, n. var. 



Series from Texas and Florida, including reared material 

 from Boerne, Tex., differ considerably from the northern 

 forms, appearing to be deserving of a varietal name, partic- 

 ularly as they breed true to their own type. This form differs 

 from typical baculi in its smaller size, vyider elytra, and paler 

 colored scales. The rostrum is proportionately and very dis- 

 tinctly shorter and more slender and not so abruptly recurved 

 at the apex, frequently being nearly straight. 



Length, 5.7-7.0 mm. ; width, 2.7-3.2 mm. ; rostrum, 5 3.0- 

 3.2 mm. ; <$ 2.5-2.7 mm. 



Habitat. Boerne, Tex. (G. Schattenberg) ; Kaufman, Ter- 

 rell, Atlanta, Dallas, Tex.; Crescent City, Fla. (Hubbard & 

 Schwarz) ; Fort Drum, Fla. (A. Fredholm). Reared from 

 acorns of Quercus vclutiiia, furnished by Mr. Schattenberg, 

 and of Q. rubra collected by Mr. C. R. Jones. 



