4 SOME INSECTS INJURIOUS TO FORESTS. 



ognized. It has been referred to many different genera, but is now 

 recognized as belonging to the genus Cyllene. Both Drury and 

 Forster received it from the "Province of New York," and referred 

 to it as inhabiting the locust tree {Bobinia pseudacacia). It is there- 

 fore evidently an American species. 



Some of the principal writers who have contributed important facts 

 on the life history, habits, distribution, and remedies are: Dearborn, 

 1821; Harris, 1826-1841; Fitch, 1858-1863; Walsh, 1865-1867; Riley, 

 1867; Lintner, 1890; Schwarz, 1890; the writer, 1891-1898; Felt, 1901- 

 1905; Cotton, 1905; White, 1906, and others. (See list of publica- 

 tions, p. 15.) 



Fig. 3.— The locust borer {Cyllene robiniz): a, male beetle; b, female beetle. Much enlarged (original). 



REVIEW OF PUBLISHED DATA. 



Gen. H. A. S. Dearborn was the first to record the more important 

 facts in the life history and habits of the insect. Indeed, so complete 

 and accurate were his observations that comparatively little has been 

 added by subsequent writers, who have extensive^ quoted and repeated 

 them. He found the beetles on the trunks of trees from the 1st to the 

 25th of September, the females depositing their ' ' snow white " eggs 

 in the crevices of the bark, four to nine in each place. These eggs 

 hatched before cold weather, and "the young larva? just buried them- 

 selves in the tender inner bark," where the}^ remained until about the 

 1st of April, when they commenced boring, and soon passed into the 

 solid wood. He stated that it could always be ascertained when and 

 where the borers were at work by the oozing of sap from the wounds 



