Dec, 1903.] Leng : North American Cocci xellid.*;. 197 



Body some wlia t depressed Neohar mon ia . 



Body convex ; 



Mesosternum truncate anteriorly Cycloneda. 



Mesosternum broadly and rather feebly sinuate Olla. 



These subgenera are supported by other characters for which the 

 reader is referred to Major Casey's " Revision." They are used here 

 as a convenient division of the genus Coccinella. 



Subgenus Coccinella. 



All the species are similarly marked on the prothorax, viz.: a 

 quadrate white spot in each apical angle. The apical margin is more 

 or less white, varying according to the species. The head is also more 

 or less white. By the variation in the elytral markings the species 

 may be separated as follows : 



A. Body larger, 5-7 mm.; 



Elytra normally nine-spotted 9=-notata. 



Elytra normally with five large marks, the median being an oblique band. 



monticola. 



Elytra normally with subbasal hand and four spots transversoguttata. 



Elytra normally immaculate californica. 



B. Body smaller, 4-5 mm.; 



Elytra normally with three bands trifasciata. 



Elytra with subbasal band, tricuspid in front and two spots tricuspis. 



Arranging the species by the markings of the head and thora.x the 

 same result follows : 



Head white in front ; thorax with pale apical margin ; suture of elytra narrowly 

 black; elytral markings usually consisting of nine spots but variable ; meso and 



meta-epimera white 9-notata. 



Head with two white spots in front ; thorax without pale apical margin; suture of 

 elytra never black ; me.so-epimera white. 



Elytral markings tending to form transverse bands transversoguttata. 



Elytral markings heavy, oblique monticola. 



Elytra immaculate californica. 



Body smaller ; head with two spots or entirely pale ; thorax with pale apical margin 

 usually broad ; suture of elytra never black ; me.so and meta-epimera white. 

 Elytral markings, when complete, three bands, varying to immaculate. 



trifasciata. 

 Elytra with subbasal band tricuspid in front and two spots tricuspis. 



The differences that separate monticola and californica from trans- 

 versoguttata are no greater than those existing between the varieties of 

 trifasciata, but they are a little more constant and are supported by 

 geographical distribution indicating former geographic races that have 

 now become permanent species. I believe that ultimately subversa 



