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NEW YORK STATE MUSEUM 



Physocnemum brevilineum Say 



A rather stout, black beetle about f6 inch long and with brownish or bluish purple 

 wing covers ornamented with three whitish lines, occurs on elm in midsummer. 



This species is an elm borer in the larval stage and the beetles have 

 been met with on this tree in May, June and July, ovipositing in the latter 



month. The adult is easily recognized by 

 its rounded thorax and brownish or bluish 

 purple wing covers, each ornamented with 

 three short, slightly oblique, whitish or yel- 

 lowish lines, one being on the basal third 

 and the other two behind, slightly parallel 

 and near the middle. It is also remarkable 

 because of its dilated femora, those of the 

 hind legs being much the larger. 



Four-marked ash borer 



Ebnria qiiadrigeminata Say 



Fig. 114 Physocnemum brevilineum, 



enlarged (original) The larva of this stout, light brown beetle about 



inch long and bearing at the base and about the middle of each wing cover, pairs of 

 ivorylike, oval elevations, bores in ash, hickory and honey locust. 



This handsome borer is easily recognized on account of its light brown 

 color and the conspicuous pairs of ivorylike elevations at the base and 

 middle of each wing cover. The slender, brown antennae are longer than 

 the body and rise between the deeply emarginate eyes. The prothorax is 

 cylindric, with conspicuous lateral tuberosities and a pair of sublateral 

 tubercles just before the middle, and posteriorly a slight median elevation. 

 The wing covers are closely and irregularly punctured, marked by several 

 more or less distinct ridges and each terminated by a pair of conspicuous 

 spines. The larva of this insect bores the trunks of honey locust, hickory 

 and probably ash, and Dr Hopkins reports taking adults in July on dead 

 beech and elm, adding that it probably infests these trees. Dr Smith states 

 that this species is rare throughout New Jersey in July on oak and hickory. 



