20 NEW YORK STATE MUSEUM 



the elytra around the scutellum; a lateral stripe that connects 

 at the humeral angle with the first of four oblique bands on the 

 elytra. The spaces occupied by the darker portions are depressed 

 and less pilose. The elytra are separately narrowed at the apex 

 and armed with a spine. The head is strongly impressed be- 

 tween the eyes. The work of the larvae is well represented on 

 the plate. 



Natural enemies. No literature on this subject exists ; but we 

 have found a number of affected alders which showed the work 

 of woodpeckers, and evidently these valuable birds are very effi- 

 cient factors in reducing the numbers of the borers. In one short 

 limb we found four good sized holes made by the birds in their 

 search for grubs [pi. 14]. We have also found many of the larvae 

 destroyed by a dipterous parasite which pupated in the burrows 

 after destroying the maker ; several larvae or pupae of this Tachinid 

 are usually found in each working. 



Another small dipterous larva is sometimes found in considerable 



numbers feeding on the larva or pupa but we have not been able to 



rear it. 



Bibliography 



1826 Say, Thomas. Acad. Nat. Sci. Phila. Jour. 5:274 (Original descrip- 

 tion); same in Ent. N. Am. Compl. Wr. 1883. 2:332 



1852 LeConte, J. L. Acad. Nat. Sci. Jour. ser. 2, 2:162 (Description) 



1853 Haldeman, S. S. Am. Phil. Soc. Jour. n. s. 10:55 (Listed as 



Anaerea obliqua) 

 1877 Provancher, L'abbe L. Faune Ent. Can. i Coleopt. p.632, 633 



(Description, rare at St Hyacinthe) 

 1880 Zesch, Frank & Reinecke, Ottoman List of Coleoptera, Buffalo and 



Vicinity, p. 10 (Listed) 

 1890 Packard, A. S. U. S. Ent. Com. sth Rep't, p.623, fig. 204 (In alder) 

 1890 Smith, J. B. Cat. Ins. N. J. p.211 (Rare on black alder) 

 1896 Beutenmuller, William. N. Y. Ent. Soc. 4:80 (In common alder) 

 1896 Knab, Fred. Ent. News, 7:113 (Beetle near tips of branches, 



Chicopee Mass.) 

 1896 Leng, C. W. & Hamilton, John. Am. Ent. Soc. Trans. 23:146, 148 



(Systematic account) 



1898 Wickham, H. F. Can. Ent. 30:40, 42 (Specific characters, food 



plant) 



1899 Lugger, Otto. Minn. Agric. Exp. Sta. Bui. 66, p. 215 (Attacks alder 



and hazel); same in Ent. State Exp. Sta. 5th Rep't, p. 131 

 1899 Smith, J. B. Ins. N. J. State Bd Agric. 27th Rep't, sup. p.296 (In 

 black alder) 



