82 Journal New York Entomological Society. [VoLvil 



Island, but is not recorded from Mexico or any other intervening 

 region. It should be removed from the lists, as there is almost cer- 

 tainly some error of indentification or locality. 



Coccinellinl 



This is by far the most extensive tribe of the family, containing 

 also the largest species and is the most difficult to treat taxonomically, 

 because of the slight amount of structural variety and the evidently 

 great number of groups, which must be accorded generic rank because 

 of habitus or summation of minor characteristics. Type of ornamen- 

 tation has not been regarded as a generic character hitherto, but is in 

 reality one of the most important, especially that of the pronotum. 

 All of our numerous species of Cocciuclla, for instance, have precisely 

 the same type of pronotal ornamentation and this is true also of Adalia, 

 Cycloneda, Aiiatis, and all others which comprise enough specific 

 torms to admit of generalization. Where two forms exist, therefore, 

 which seem to belong to different generic types but which do not differ 

 structurally to any decisive extent, I have regarded the general scheme 

 of pronotal ornamentation, and, to a less degree, that of the elytra, as 

 the deciding criterion. 



In the following table all the genera accessible to me are included, 

 the exotic ones having an asterisk affixed : — 



Metacoxal lines arcuate or feebly angulate, continuous, not quite entire, the plates 

 distinctly shorter than the first ventral segment; body oval (Subtribe Adalia ).. 2 



Metacoxal lines curving outward to the sides of the body along the first suture, the in- 

 cluded area frequently divided by an oblique line, which may or may not join 

 the curve posteriorly ; body rounded, rarely oval or suboblong 5 



2 — Tarsal claws simple, long and well developed ; body broadly oval, distinctly punc- 

 tured, pale, maculate with black spots, the scutellum moderate in size ; antennre 

 moderately short, with a rather broadly obtriangular compressed 3-jointed club ; 

 metacoxal lines arcuate, the plates slightly shorter than the segment ; basal node 

 of the last tarsal joint partially free. Palsearctic ^Buleea 



Tarsal claws with a large subquadrate basal tooth ; antennre slightly longer, with an 

 obtriangular and more closely connate club, the last joint as wide as long 3 



3— Scutellum very small and equilaterally triangular ; body distinctly punctate ; pro- 

 sternal process not distinctly bicarinate. Subarctic of both hemispheres . Adalia 



Scutellum slightly larger, acutely pointed and longer than wide. Austral Africa. . .4 



4 — Body oval, subimpunctate ; prosternal process not evidently bicarinate. 



^Lloadalia 



Body more rounded, finely punctate ; prosternal process very narrow, with two strong 

 parallel carinii? extending almost to the apex */SOra 



