1917 



Notes on Coccinellid Genus Adalia Midsant 



301 



H— hatched. M— molted. P— pupated, bi.— bipunctata. an— annectans. 



The bipunctata specimens in this experiment were really 

 bipunctata annectans hybrids. 



The ayinectans larvae, it will be observed, have eaten less 

 than the bipunctata individuals, but this is probably only 

 accidental, as the larvae of the same species seem to vary 

 greatly, and these specimens were all the same size, and should 

 therefore be of equal capacity. It is interesting to notice that 

 the one that ate the most lice was slightly the shortest when full 

 grown. 



These results seem to differ somewhat from those given by 

 Mr. Clausen, in California, in his paper of 1916.* The difference 

 is probably due to climatic conditions influencing the rapidity 

 of development, as the 'totals, it will be seen, do not differ any 

 more from these results than has been found as a common 

 variation between individuals of the same species even under 

 the same conditions. During the spring when the weather was 

 cool the beetles ate much less per day and the life cycle periods 

 were much longer. Though no counts were made at this time 

 there is no doubt but that they would not disagree materially 

 with the records of Mr. Clausen. 



Perhaps the following observation on Ilippodamia convergens 

 might also be added. On July 18, 1916, this species was 

 found by the writer congregated in heaps of hundreds in grassy 

 crevices in the solid granite top of a foot-hill, 38 miles north- 

 west of Ft. Colhns, at an altitude of a little over 8,000 feet. 



*Life-history and Feeding Records of a Series of California Coccinellidae by- 

 Curtis P. Clausen, University of California Publications, Technical Bulletins 

 Entomology, Vol. I, No. 6, pp. 251-299, June 17, 1916. 



