18 THE CA.NADIAN ENTOMOLOGIST. 



the male will be found worn or broken, while the female is uninjured in 

 wing, and therefore must have lately left the chrysalis. 



9. Effect of Cold applied to certain Larvse. 



I was feeding a brood of Coenonympha Ampelos, in June, from eggs 

 sent from Vancouver Island, by Mr. Fletcher. After second month all 

 the larvge showed signs of lethargy except one, which went rapidly to 

 pupa, having passed but three moults. (At same time I was feeding 

 larvae of C. Galactiniis from eggs sent by Prof. Rivers, from California, 

 and all these pupated after but three moults. From the pupje came Cali- 

 fornius, proving this species to be seasonally dimorphic, Galactinus 

 being the winter, Calif ornms the summer form.) 



The remaining Ampelos larva spoken of at last rested asleep. Early 

 in August, I placed them on ice, temp, about 32°, and there left them 

 three months, till 7th Nov., having in mind to delude them mto a belief 

 that winter was over and gone when they should be brought into warm 

 air again. The experiment succeeded perfectly as to part of the larvae 

 On 2ist Nov., one passed 3rd moult, and 2nd Dec. a 4th moult, and 

 30th Dec. pupated. Another passed 3rd moult 23rd Nov., but has not 

 yel reached the 4th (as I write 5th Jan. '86.) In fact, these larvae feed 

 and move about only when placed in sunshine, and cloudy days and cold 

 nights retard their growth. Two other larvae seem to have gone to sleep 

 again, and have not moulted since they left the ice. It is usual for larvae 

 to pass a moult soon after the end of hibernation, apparently to get rid of 

 the shrunken skin, and this is an extra moult. At least, I have found this 

 so, whenever the larvae hibernate half grown, so that Ampelos should 

 pass four moults if hibernated, though three are the rule in summer. 



ON TWO NEW HEMIPTERA-HETEROPTERA. 



BY WM. H. ASHMEAD, JACKSONVILLE, FLORIDA. 



Among a very interesting collection of Mexican and other Hemiptera 

 sent to me by Mr. Samuel Henshaw, Curator of Boston Society of Natural 

 History, for identification, I find two species new to science and peculiar 

 to genera never before detected in North America, although both are well 

 represented in the European fauna. 



In the first genus, Stefiocephalus A. & S., in Europe, four species are 

 known, principally peculiar to the southern portions of that continent. 



