46 EVOLUTION IN COLOR-PATTERN OF THE LADY-BEETLES. 



A specimen from Kalispell, Montana, and one from between Hope and 

 Okanogan, British Columbia, in the collection of Mr. F. K. Bowditch, belong 

 here. A specimen in the Museum of Comparative Zoology from the 

 Bitterroot Mountains has the characteristics of this species and, in addi- 

 tion, a slight confluence of 4 -f 5 and 6 which is subordinate to the extreme 

 confluence of 4 + 5. Further collections in these mountains adjoining the 

 type locality might give us in this species a still further development in 

 this direction. 



3047. Hippodamia spuria Leconte. 



Distribution: Plateau and Pacific States and British Columbia. 



This is a variable species (fig. 29) , but the forms show little geograph- 

 ical differentiation. H. sinuata and cockerelli are specifically distinct 

 derivatives, so far as our present knowledge goes. 



Typical pattern (fig. 29, a) : Suture not black, except at basal quarter. Spots 1, 4, 5, 6. 



256 individuals in 759 = 34 per cent, at Fairfi eld, Washington. 

 Var. lineata (n. var.). 



The scutellar spot is replaced by a black suture only slightly wider at one-quarter. 

 Intergrades occur, but they are less common than the variety. This char- 

 acter is found in conjunction with most of the varieties of elytral pattern; 3 

 in 759 with 2 transitional, at Fairfield, Washington. 

 Var. a. 



Spots 1, 4 + 5, 6. 447 in 759 =59 per cent, at Fairfield, Washington (fig. 29, h). 

 Var. 0. 



Spots 1, 5 + 4+ 6. 37 in 759 =5 per cent, at Fairfield, Washington (fig. 29, k). 

 Var. complex Casey. 



1+4+5+6. Scutellar mark short. Not at Fairfield, Washington; Vancouver 



Island (fig. 29, j). 

 Var. crotchi Casey. 



1 + 4 -f- 5, 6. Scutellar mark short. 12 in 759 = 2 per cent, at Fairfield, Washing- 

 ton (fig. 29, i). 

 Var. y. 



Spots 1, 4 + 5 + 6. Rare, Idaho. Nowhere established (fig. 29, n). 

 Var. c. 



Spots 1 absent, 4, 5, and 6 reduced. 2 in 759 at Fairfield, Washington; Colorado 

 (fig. 29, q). 



Subspecies of Colorado: Reduction is most manifest in Colorado, a par- 

 allel to the condition in Hippodamia apicalis in Colorado. Whether it is 

 local to some part of Colorado, as is probable, or not, can not be told 

 because of the former pernicious habit of labeling by States only. 



The confluence manifests itself in each individual either as 1+4+5 or 

 5+4+6, and never at Fairfield involving all 4 spots even in a slight degree. 

 The two varieties are therefore distinct in this locality. In Vancouver 

 Island, however, the combination is found. 



