Junei8^ 9 -1 CASEY : On AMERICAN COCCINELLIDJE. 79 



8 — Pronotum closely punctulate ; basal band of the elytra equally broad throughout, 

 with a scutellar angulation as in 5-signata ; post-median spot broad, slightly 

 oblique and oval, the subapical wholly obsolete; surface of the elytra strongly 

 alutaceous and rugulose ; body small and more depressed. Length 4.5 mm.; 

 width 2.7 mm. Colorado dispar, sp. nov. 



Pronotum minutely and sparsely punctulate, more convex and polished ; basal band 

 of the elytra crescentiform, acuminate at the callus, with an anterior scutellar an- 

 gulation ; elytra polished 9 



9 — Elytra undulato-rugulose externally and toward apex, without trace of black spots 

 behind the basal band. Length 5.1 mm.; width 3.1 mm. California (Ala- 

 meda) extensa Muis. 



Elytra smooth throughout 10 



10 — Elytra closely punctate ; post-median feebly oblique line narrow and composed of 

 two slightly confluent transverse spots ; subapical spot of 5-signata and allies 

 visible as a minute and feeble point. Length 4.75 mm.; width 3. 1 mm. Cali- 

 fornia? subsimilis, sp. nov. 



Elytra sparsely punctate, the post-median spot almost transverse, narrow and subentire, 

 the subsutural part not more basal — as it evidently is in subsimilis — the sub- 

 apical spot completely obsolete ; surface very highly polished throughout. 

 Length 5.8 mm.; width 3.6 mm. Wyoming — Mr. Wickham. . . vernix, sp. nov. 



II — Pale lateral margin of the pronotum wider anteriorly and posteriorly, the angu- 

 lar extension of the black area strongly marked , 1 2 



Pale margin narrower and much less unequal in width from apex to base, the angu- 

 lar extension of the black area more obtuse ; diverging discal pale spots distinct ; 

 elytra each with six black spots nearly as in 13-punetata, the three posterior gen- 

 erally more developed and constant, the lustre faintly alutaceous 16 



12 — Subapical spot of the elytra large, constant and conspicuous, the two post-median 

 spots large and obliquely coalescent ; anterior spots always wanting, the scutel- 

 lum alone black; body large and rather broadly oval. Length 5.9-7.0 mm.; 

 width 3.75-4.7 mm. New Jersey and Indiana glacial is Fabr. 



Subapical spot of the elytra invariably wanting 13 



13 — Elytra very feebly alutaceous, being distinctly microreticulate under sufficient 

 amplifying power 14 



Elytra very highly polished and rather more distinctly, though not more closely, punc- 

 tate, the punctures rather more impressed, the interspaces devoid of distinct mi- 

 croreticulation 15 



14 — Form broadly oval, the elytra wholly devoid of black spots, excepting a small 

 scutellar suturaldash ; pronotum frequently devoid of diverging discal pale spots. 

 Length 5.2-6.6 mm.; width 3.6-4.5 mm. Coast regions of California from 

 San Diego to Sonoma \_punctulata Lee] ambigua Lee. 



Form narrowly oval, the elytra generally with a small subsutural transverse spot be- 

 hind the middle which is sometimes joined to another external and more poste- 

 ior, frequently wholly immaculate or with only a small scutellar dash and, rarely, 

 exhibiting very minute post-scutellar points ; scutellum always black ; discal di- 

 verging lines of the pronotum always very fully developed, sometimes coalescing 

 anteriorly with the lateral pale area. Length 4. 2-5.0 mm.; width 2.5-3.5 mm. 

 California (Sonoma Co. ) obiiqua, sp. nov. 



