Vol. XXXl] ENTOMOLOGICAI/NEW^ 7 



Chrysobothris harrisii Hentz. Adults were reared in June from 

 small branches of Virginia pine (Pinus virginiana) collected at Hummels- 

 town, Pa. 



Actenodes acornis Say. From material collected at Hummelstown, 

 Pa., adults were reared as follows: On June 15, from the wood of dead 

 red maple (Acer rubrum); on June 24, from dead beech (Fagus americava); 

 on June 6, from dead black birch (Betula lento); on June 10, from dead 

 hickory branch; on June 15, from dead black oak (Quercusvelutina). The 

 larvae work through the heart-wood of the host-plants, often entirely 

 riddling them. 



Acmaeodera culta Web. On September 7, a living adult was chopped 

 from a dead hickory branch at Cresco, Pa. Adults were reared August 10 

 from dead white oak (Quercus alba) branch collected at Hummelstown, Pa. 



Ptosima gibbicollis Say. In the vicinity of Hummelstown, Pa., this 

 species breeds in redbud (Cercis canadensis), often attacking living trees, 

 hastening their death and decay. The larvae work in the heart-wood 

 of the tree and the adults which appear in the spring mature in the fall 

 and pass the winter in the pupal cells. 



Eupristocerus cogitans Web. Forms galls on alder (Alnus rugosa 

 and A . incana). The egg, which is covered with a chitinized protective 

 covering, is deposited at a node, or at a point where the bark is rough. 

 The egg hatches and the young larva goes beneath the bark after which 

 it works down the stem for a short distance. It then encircles the stem, 

 which injury later forms a gall on the plant. The life history extends 

 over a period of two years, and the pupa cell is made at the top of the 

 gall. 



Agrilus juglandis n. sp. 



Form and color of A. masculinus. Antennae greenish, not quite reach- 

 ing beyond the middle of the prothorax, serrate from the fourth joint ; 

 head slightly convex, a feeble occipital impression, more distinct in the 

 female; front densely punctate, becoming slightly strigose on occiput, 

 middle of front to clypeus covered with long white pubescence. 



Prothorax wider than long, narrowed at base, sides in front arcuate, 

 lateral margin sinuate, hind angles with a well denned carina in both 

 sexes; disk convex, with an oblique lateral depression on each side, two 

 depressions on median line as in A. otiosus; surface transversely st rigour. 

 Scutellum transversely carinate, surface granulate. Elytra slightly sinu- 

 ate behind the humeri, dilate behind the middle, apices separately rounded 

 and serrulate; disk with a faint costa on each side, basal depressions 

 shallow, sutural margin elevated behind the middle; surface closely im- 

 bricate-granulate. Body beneath more shining than above, prosternal 

 lobe broadly emarginate; prosternal process broad, slightly narrow in-, 

 acute at tip. Pygidium without a projecting carina. First joint of 

 hind lai'Mis as long as the following three joints: tarsal daw- 



