X26 SECOND REPORT OF THE STATE ENTOMOLOGIST. 



Amphicerus bicaudatus. Shimer: in Trans. Amer. Ent. Soc, ii, 1869, pp. viii, is 



(iu grape vines). 

 Amphicerus {Bostrichus)hicaudatus. Glover: in Rept. Commis. Agr. for 1873, p 



118, fig. 8. 

 Bostrichus {Amphicerus) bicaudatvs. Riley: 4tli Rept. Ins. Mo., 1872, pp. 51-53, 



figs. 24, 25 (appear., habits, etc.); 5tli Rept. do., 1873, p. 54 (occur, iu 



N. J. and Md. , and larval food-plant). 

 Bostrichus (Amphicerus) hicaudatus. Thomas: 6tli Rept. Ins. 111. [1877J, p. 123 



(descr. of beetle). 

 Bostrichus hicaudntas. Osborn: in Trans. Iowa St. Horticul. Soc. for 1879, p. 94, 



1880 (brief notice). 

 AmpJdccrus hicaudatus. Riley: in Amer. Entomol., iii, 1880, p. 51, figs. 11, 12- 

 AmpJiicerus bicaudatus. Saunders: Ins. Inj. Fruit, 1883, pp. 33-35, figs. 21, 22 



(general notice). 



This little, and sometimes quite destructive beetle, has long been 

 known in our Western States, especially in Michigan and Illinois, from 

 its more frequent occurrence there, but has not, until recently, been 

 found in the State of New York. It extends southward, at least, into 

 North Carolina, and in the south-west into Texas. 



It is a small, cylindrical, dark chestnut brown beetle, black beneath 

 from one-fourth to three-tenths of an inch long, with a small depressed 

 head, its thorax quite elevated and spinose, and extended 

 in front in two little horns The winsj-covers are also 



l\ rP" Al ^"-"^S^^' granulated, and in the male they terminate in 



^ > two short horns, as shown at b in the accompanying 



Fig. 28. -The Apple- outline figures, from which feature it derived its specific 



twis bo.er, Amphice- o ' >■ 



fe'Jr.aie'^-r-u.eUaie'" name, meaning two-taiUd. 



The original description by Mr. Say is quite brief, as follows : 



A. bicatidafus. Dark reddish-brown; thorax asperous and bicornate 



before ; a prominent obtuse spine near the tip of the elytra. 



Vegetation Attacked. 



The insect, as appears from its common name above given, usually 

 attacks the twigs of apple-trees. It is, however, known to occur upon 

 the pear and cherry-tree under like conditions, and has also been found 

 within grapevines, doing far more harm to them than to fruit-trees, if 

 the statement made to the Department of Agriculture and quoted by 

 Mr. Glover {loc. cit. sup.), can be relied upon, viz.: "In Iowa, 

 seven to nine-year-old vines are killed from the root up by these insects, 

 and out of fourteen vines eleven were killed " (they were identified by 

 Mr. Glover as A. bicatidafus from examples within the vines). 



The statement was also made to the Department, that the same beetle 

 had done much damage in Kansas by boring into twigs of young 

 hickory. 



