June 1899.] Casey: On American Coccinellid^e. 103 



others employed in the table are sufficiently constant to afford specific 



criteria. 



Epilachnini. 



A very extensive tribe, especially in the tropics of the western 

 hemisphere, but of which only two or three species occur within the 

 United States. It is probable that the great genus Epilachna may be 

 subdivided for convenience, as there is a remarkable variety in form, 

 sculpture and style of ornamentation among its species. 



Epilachna Chev. 

 The two species known to me may be defined as follows : — 



Body very broadly oval, shining, pale orange-yellow, the punctures rather coarse, 

 deep, unequal and moderately close ; pubescence short, moderately abundant ; 

 head immaculate, the pronotum pale, with an apical and basal black spot on the 

 median line, the basal the larger, and one at each side just behind the middle 

 near the margin ; elytra each with two elongate-oval sutural spots just behind the 

 middle and at basal fifth, the posterior much the larger, also with two submargi- 

 nal in range with the two subsutural, a median subbasal very small, a central sub- 

 equal to the posterior submarginal, and a large subquadrate subapical spot ; meta- 

 sternum blackish ; legs pale. Length 7. 2-8.0 mm. ; width 6.0-6.6 mm. Eastern 

 United States borealis Fabr. 



Body more narrowly oval and distinctly smaller, duller in lustre, densely pubescent 

 and very closely, unequally punctured, pale yellowish-brown in color, the head 

 and pronotum without spots ; each elytron with three very small subbasal spots, 

 the median less basal, and three in a transverse range just before the middle, 

 scarcely larger than the subbasal, the median a little larger, and two near apical 

 fourth, as small as the subbasal, placed near inner fourth and outer third ; under 

 surface and legs pale throughout. Length 6.4-7.0 mm. ; width 5.0-5 5 mm. 

 Sonoran regions corrupta Muls. 



Mexicana Guer. , is said to occur within the United States, but I 

 have seen no examples from this country • the upper surface is black 

 throughout, the elytra each with six large rounded pale spots in two 

 •equilateral triangles ; my specimens, from Guerrero, have the legs 

 pale, the femora black except at apex, in fact colored exactly as in de- 

 fecta, from Honduras. Defccta is, however, a shorter and more 

 broadly ovular species, with less pronounced dilatation at basal fourth 

 of the elytra. The metacoxal plates in Epilachna, are arcuate but not 

 quite entire, and are always much shorter than the first segment. 



Pentiliini. 

 This tribe includes the genera Pentilia, Cryptognatha and probably 

 Bura of South America and the West Indies, Lotis and Xestolotis of 



