56 SECOND REPORT OF THE STATE ENTOMOLOGIST. 



Canada, were indulged in^ based upon its observation in Denver, north 

 of the isothermal line of 40° Fahr. 



The following observations of it, by Mr. A. S. Fuller, of Ridgewood, 

 N. J., kindly communicated to me, would. indicate a power of endurance 

 of cold possessed by it, to a far greater degree than hitherto supposed: 



" I have seen it by the millions feeding on sunflowers in New Mexico, 

 at an elevation of 9,000 feet, where a temperature of 30° below zero in 

 winter is not at all unusual." 



Dactylopius longifilis Comstock. 



This Coccid was received July 8, 1882, from Mr. George B. Simpson. 

 It occurred in Waterbury, Conn., on the prickly-pear cactus, where it 

 was first observed the previous winter. Mr. S. states that the eggs 

 seem to be placed, in preference, on the strips of cloth with which the 

 plants are tied to the stakes. 



For the description and illustrative figures of this species, see Prof- 

 Comstock's Report in the Report of the Comniissioiier of Agriculture for 

 the year 1880, p. 344, pi. 11, f. 2, and pi. 22, f. i. 



Heliothrips h.e.morrhoidalis Bouche. 



In my First Annual Report on the Insects of New York, in the list of 

 Insect Depredators upon the Apple-tree, the above species was included 

 upon the statement of its observation by Mr. Theodore Pergande, of the 

 Entomological Division of the Department of Agriculture, as follows: 



"This year [1882], as late as November 14, after several quite cold 

 days, I found for the first time Heliothrips ha/norrhoidatis Bouche, on 

 apple leaves in the orchard of the U. S. Department of Agriculture, as 

 lively and active as in hot-houses, where this species was only observed 

 previously." 



The special study which Mr. Pergande is giving to the Thripidce, an 

 interesting and but little known family of the Homoptera, renders valu- 

 able the following note from him in relation to the above insect: 



" I wish to call your attention to the fact that Heliothrips hcemorrhoidalis 

 is not strictly an insect which depredates on the apple, but which was 

 only accidentally on the trees, having evidently wandered from the hot- 

 house plants near by to the apple, and was not again seen on the trees 

 the last year. If the climate would be constantly warm, I have no doubt 

 but that it would live and multiply on the apple as well as it does on a 

 great variety of plants which are kept in hot-houses. I simply mentioned it 

 to show how readily foreign species of insects may be introduced, if they 

 find the climate and other conditions congenial to their propagation." 



