Report of the State Entomologist 



317 



As the young larva approach their pupation they sink their burrow 

 within the wood until it is contained wholly therein, to a depth not 

 exceeding one-eighth of an inch. A transverse section before me, of 

 six-tenths of an inch diameter, shows nine of these burrows, in one 

 of which, quite near the surface, the head of a pupa is seen. 



This beetle is the Tomicus mali, of Dr. Fitch's Third Report, wherein 

 the beetle is named and described, but with no mention of its 

 burrows. 



The above notes were made several years ago. On referring to 

 the description by Mr. Schwarz, of the galleries and sub-galleries of 

 M. mali, contained in the Proceedings of the Entomological Society of 

 Washington, i, 1890, pp. 44, 48, it is found to disagree entirely with 

 that of the burrows as above described. It would seem, therefore, 

 that the example identified, as above, was not the infesting beetle of 

 the apple-tree, but was only incidentally present in association with 

 the more abundant species. What was this species ? 



Aphis brassicee Linn. 



The Cabbage Aphis. 



Mr. E. P. Van Duzee, of Buffalo, N. Y., reports this insect as exceed- 

 ingly abundant in many of the gardens of the city during the autumn 

 of the present year. Its parasites and predaceous enemies seemed 

 correspondingly abundant, 

 and it was expected that 

 their multiplication would 

 tend to prevent the appear- 

 ance of the pest in unusual 

 numbers in the following 

 year {in lit). 



A similar abundance of 

 the species was noticed in 

 New Jersey, by Professor 

 John B. Smith, who states 

 in Bulletin No. 72, of the New Jersey Agricultural College Experi- 

 ment Station: "This insect has been unusually abundant during the 

 year. The plants were sometimes so crowded with the lice that it 

 was impossible to see the leaves, and the plants were so devitalized 

 that they failed to grow." 



In the above-named Bulletin, Professor Smith has illustrated the 

 antennal structure of the species, showing the peculiar sensory pits 

 which, iu this family, afford good specific characters. The same is 

 41 



Fig. 34.— Winged and wingless females of the 

 cabbage aphis, Aphis BRASsica:, enlarged. 



