JuneiSgg] CaSEY : On AMERICAN COCCINELLID^E. 107 



genera, only rarely exhibiting any trace of lateral compression. The 

 punctuation is very minute or subobsolete, but in mafginipennis becomes 

 quite distinct though sparse. The species before me may be outlined 

 as follows : — 



Body strongly compresso-convex as in Chilocorus, the anterior tibire more dilated and 

 arcuately sublaminate externally ; body rounded, deep black above, the under 

 surface and legs throughout testaceous ; head slightly rufescent at the apical mar- 

 gin ; pronotum with the edge slightly rufescent at the apical angles ; elytra mi- 

 nutely punctulate, more distinctly toward the margins, which are evenly decliv- 

 ous to the edge and not at all reflexed, with a very fine marginal bead, each with 

 an elongate-oval red spot on the median line, extending two-fifths from the base, 

 with its margins rather nubilate. Length 3.7-3.9 mm. ; width 3.0-3.2 mm. 

 Arizona arizonicus, sp. nov. 



Body evenly and less strongly convex, not at all compressed, the anterior tibiae nearly 

 straight externally and not laminate, the elytral margins narrowly but abruptly 

 reflexed, and with a more distinct marginal bead. 2 



2 — Pronotum black throughout ; body oval ; elytra black, with a large humeral and 

 small discal posterior spot pale, the marginal bead black 3 



Pronotum black throughout ; body rounded, more convex, the elytra pale with black 

 spots and marginal bead black 4 



Pronotum black, nubilously pale at the sides or at the apical edges near the angles ; 

 body rounded or oval, moderately convex, the elytra with a black design, the 

 side margins always pale 5 



3 — Elytra polished or feebly alutaceous, obsoletely punctulate, the pale humeral spot 

 parallel with the side margin, about twice as long as wide, without tendency to 

 prolongations along the basal or lateral margins, the discal spot rounded, clearly 

 defined, situated at apical fourth and inner third ; under surface and legs black, 

 the epipleuras pale except behind the middle. Length 2.8-3.8 mm. ; width 

 2.3-3.0 mm. California (San Francisco to Humboldt Co.). 



californicus, sp. nov. 

 Var. A — Similar but with the elytra strongly alutaceous, and with the humeral 

 spot extending narrowly along the margin for a short distance posteriorly but 

 not along the base. San Francisco. 



Elytra polished, very minutely punctulate, black, the pale humeral spot more sinuate 

 within and more angular internally at its posterior limit, continued along the 

 margin with broadly sinuate internal outline and gradually narrowing, becoming 

 extinct at a point opposite the discal spot, also extended narrowly along the basal 

 margin very nearly to the scutellum ; discal spot subtriangular, at posterior fourth 

 or fifth and much nearer the suture than the margin. Length 3.0-3.3 mm.; 

 width 2.2-2.7 mm. Indiana? ovoideus, sp. nov. - <w«*^ 



Elytra polished, minutely and sparsely but somewhat more distinctly punctulate, the 

 humeral spot oblong and about twice as long as wide, as in the two preceding 

 somewhat prominent within at its posterior limit, abruptly narrowed and con- 

 tinued along the lateral and basal margins as in ovoideus but more broadly at the 

 base, the discal spot subtriangular, at the same position but continued forward 



