OP WASHINGTON, VOLUME XIV, 1912. 



narrowed toward base, dorsal area slightly concave, inter- 

 spaces 1 and 3 about evenly elevated, 5 somewhat more than 

 3, especially toward apex, the former joins 7, then is 

 strongly angled and curved inward, joins 3, and proceeds 

 to apex, where it joins 9 and 1, a very noticeable character; 

 even interspaces appearing obsolete, strial punctures close 

 set, large, each with a bristle pointed obliquely backward, 

 front of head concave, densely granulate, with prominent 



median tubercle fiskei, n. sp. 



Texas (Montell). 



Length 2.3 mm. Body stout, pronotum subquadrate, narrowed 

 posteriorly, side margins broadly evenly arcuate, median 

 impression deep, broad, within it a pair of approximate 

 tubercles close to anterior margin and a pair of acutely ele- 

 vated parallel lines extending from posterior margin anter- 

 iorly for one-fourth the length of the pronotum; at either 

 side an acutely elevated costa, nearly straight from posterior 

 to anterior margin, where it curves inward and joins the 

 marginal tubercle; elytra narrowed anteriorly, strongly 

 concave, interspaces 1 and 3 finely, acutely, evenly ele- 

 vated from base to apex, 5 greatly elevated, much 

 more than 3, straight to near apex, where it joins 7, is 

 then strongly curved inward, and extends as an elevated 

 ridge to the apex, joining also 3 and l;~even interspaces ap- 

 pearing obsolete, stria! punctures dense, close set, coarse, 

 equally distinct throughout, head and the margins strongly 

 reflexed and elevated over the eye; front densely evenly 

 granulate with prominent longitudinal median tubercle. 



bitomoides, n. sp. 

 Arizona (Flagstaff). 



SECTION A6. 



Anterior margin of pronotum with two curvate elevations. 



SUBSECTION B3 

 Anterior margin without curvate elevations SUBSECTION B4 



SUBSECTION B3. 



Margins of median impression of pronotum broadly arcuate and 

 slightly converging posteriorly; interspace 3 distinctly ele- 

 vated from base for at least three-fourths its length... SERIES C3 



Margins of median impression sinuate, scarcely or not at all con- 

 vergent posteriorly; interspace 3 not distinctly elevated be- 

 yond its anterior fourth SERIES C4 



SERIES C3. 



Length 2. 5-3 mm. Pronotum longer than wide, posteriorly faintly 

 narrower than elytra at base, shining, side margins nearly 

 straight, slightly convergent posteriorly, median impression 

 with a distinct median carina, punctures very fine, simple, 



