June 1899.] Casey: On American Coccinellid^e. 117 



and presents the same difficulties in regard to discrimination of the 

 species. The male sexual characters of the abdomen are, however,, 

 much more pronounced and are frequently very valuable in denning 

 closely related forms. The forms which seem to merit distinctive 

 names may be denned as follows : — 



Elytra pale at base, or each with a pale spot near the middle of the basal margin. .2 



Elytra never conspicuously pale or maculate at base, except sometimes at the humeral 

 angles 12 



2 — Elytra each with five clearly defined and isolated pale spots, two basal, two in a 

 transverse line very near the middle and one subapical, the humeral constant in 

 both sexes 3 



Elytra with the basal and lateral margin pale, and each with a discal pale spot 8 



Elytra black, with a basal and subapical pale spot but without a spot near the 

 centre , 9 



Elytra pale, each with two black spots, one anterior and one posterior II 



3 — Spots generally separated from each other longitudinally by more than their own 

 dimensions 4 



Spots relatively larger, whitish, Separated by their own diameter or less 7 



4 — Basal spot almost fully circular, only slightly truncated by the basal margin ; body 

 small, elongate-oval, piceous-brown in color ; head and subquadrate sides of the 

 pronotum flavate in the female ; elytra finely but strongly, sparsely punctate, 

 polished, the spots nearly equal, moderately large, the subapical largest and the 

 humeral smallest; under surface piceous ; legs pale throughout. Length I 9-2.1 

 mm. ; width 1. 3-1.45 mm. Indiana stellata, sp. nov. 



Basal spot never much more than semi-circular, broadly truncated by the basal 

 margin 5 



5 — Male with the two median lobes of the basal black area of the pronotum narrowly 

 rounded 6 



Male with the two median lobes broadly and rectilinearly truncate, the dividing spur 

 of the apical pale margin short and very minute or obsolete, body more broadly 

 oval than in ursina and more variable in size, finely punctulate ; spots small, 

 variable in size and form among themselves, the subapical usually the most con- 

 spicuous. Length 2.1-3.6 mm. ; width 1.6-2.75 mm. North Carolina (Ashe- 

 ville) COngruens, sp. nov. 



6 — Black area of the pronotum in the male more extended, its two approximate 

 median lobes approaching rather close to the apical margin ; elytral spots, except 

 the humeral, well developed and subequal in size ; body elongate-oval. Length 

 2.75-3.75 mm. ; width 2.0-2.7 mm - Massachusetts, New York, Pennsylvania 

 and Indiana ursina Fabr. 



Black area less developed, the apex broadly pale even before the median lobes ; 

 elytral spots smaller and very unequal, the two median much smaller than the 

 basal or apical ; body smaller, with the punctures much less fine and notably 

 sparser. Length 1.8-2.3 mm - '■> w 'dth 1. 2-1.6 mm. Pennsylvania and Mary- 

 land 10-pustulata Mehh. 



