BULLETIN 407 



family 'Cerambycidae includes medium- to large-sized beetles, of graceful 

 form, and, in most cases, with very long antennae, whence the common 

 name Longicorns, 1 or long-horned beetles. For the most part their larvae 

 are wood borers, some of the most important enemies of our forest and 

 shade trees being found among their number. 



The genus Cyllene, to which this species belongs, together with several 

 other groups now ranking as distinct genera, was formerly included in 

 the old genus Clytus. Because of definite, well-marked characters, 

 Newman (1840) described it as a distinct genus as follows: 



Facies Clyti: caput parvum, fer& pronum, antennae maris corpore longiores, feminae 

 valdS breyiores, ii-articulatae; articulis externis manifestd crassioribus, 3-6 apice 

 spini brevi armatis: prothorax latus, dorso convexus, lateribus rotundatis dente postico 

 armatis: elytra convexa, apice i-spinosa: pedes simplices. 



Cyll. spinifera. Fusca, obscura, lanuginosa: prothorax maculis duabus glabris orna- 

 tus: antennarum articuli basi cinerei: elytra fusca, maculis fasciisve lanuginosis cinereis 

 ornata. (Corp. long. .7 unc. lat. .225 unc.) 



Inhabits South America. Specimens taken by Mr. Darwin are in the cabinet of 

 the Entomological Society. I find no description of this insect in Serville's " Nouvelle 

 Classification", but it is by no means uncommon in collections: it bears as close a 

 resemblance to Clytus, as Phacodes to Callidium. 



This genus includes about thirty-five species, all of them inhabitants 

 of the new world. Their distribution is shown in table i. 



TABLE i. THE DISTRIBUTION OF THE SPECIES OF CYLLENE 



Much confusion has existed regarding the identity of the species in 

 question. The earliest writers confounded it with the locust borer 

 (Cyllene robiniae Forster), it being then the common supposition that the 

 latter species had two broods annually, the first emerging in spring and 

 attacking the hickory, and the second emerging in late summer and 

 attacking the locust. Not only were the insects confused, but, until 

 quite recently, the hickory species itself was incorrectly named, being 

 known as Cyllene pictus Drury, a synonym of Cyllene robiniae Forster. 

 Consequently Gaylord (1843), Harris (1862), and other writers mentioned 

 this species as being found on goldenrod in late summer, and attacking 

 the locust, while Fitch (1859) and Rath von (1860) stated that the locust 



