HIPPODAMIA. 

 TABLE I. The species of Hippodamia. 



19 



Group. 



Species. 



( 'onvergens. 



(glacial is. .. . 

 1 bowditchi . 

 (convergens , 



Spiiria 



cockerelli 



dispar 



oregonensis 



sjniriii 



smuata 



f-varfegata . . 



Septemmaculata variegata J doubledayi 

 I bifurcata* . . 



Tredecimpunctata 



Parenthesis. 



Locality. 



Northeastern States and Canada. 

 Northern Rocky Mountains. 

 North America. 



Rocky Mountains. 

 Colorado. 



Cascade Mountains. 



Western States. 



China and Pacific States. 



Incertse sedis. 



/ tredeeimpunctata Europe, Siberia, United States, Canada. 



\ americana Hudson Bay, Lake Superior. 



parenthesis North America. 



apicalis Western States. 



lengi Southern California. 



amoena Eastern Siberia. 



arctaea Europe. 



( falcigera Hudson Bay, Great Stone Lake. 



- kreiclibaumii Abyssinia. 



( racemosa 



TABLE 2. Comparison of mean and extreme dimensions of some species of Hippodamia. 

 [Measurements, except those in percentage, expressed in units of 0.0625 mm.] 



3044. Hippodamia glacialis Fabricius. 



Distribution: United States and Canada. 



The color-pattern (fig. 8) of this species is approached and even realized 

 in some cases by specimens of H. convergens in the Western States beyond 

 the usually recognized range of H. glacialis. Yet complete intersterility 

 was found to prevail in repeated tests between eastern specimens of the 

 two species. Whether this intersterility is bridged over by these speci- 

 mens in the Western States I was unable to test. 



