190 MISC. PUBLICATION 657, U. S. DEPT. OF AGRICULTURE 
KEY TO THE LARVAE OF THE MORE IMPORTANT GENERA OF BUPRESTIDAE— 
Continued 
9. Anterior end of dorsal inverted Y or V marking simple____~______ 10 
Anterior end of both dorsal and ventral markings with broad 
reticulatedhends!* sce 2S [xine se Sees cee ae te 11 
10. Dorsal marking an inverted Y; breeds in oak____________- Cinyra 
Dorsal marking an inverted V; breeds in willow and poplar 
Poecilonota 
He Dorsal marking an inverted V with a broad reticulated apex; 
mandible tridentate; breeds chiefly in hardwoods_-—-____- Dicerca 
Dorsal marking an inverted Y, the apex surrounded by a depressed 
shining diamond-shaped area; mandible tridentate; breeds in 
Conifersa! s sols Sauk Bee Tire ae geen og eee Trachykele 
12. First abdominal segment smaller than the following; plates of pro- 
thorax whitish opaque; prothoracic grooves dark brown; breeds 
In PeADUGe 5 Se 2 ee i es ee as, Ptosima 
13. First segment as broad or slightly broader than the following; body 
eradually tapering to the twelfth, slightly wedge-shaped_ Brachys 
First segment narrower than the following; body tapering both 
ways from about the middle, more acute at the posterior end; 
spindle-shaped a. Je ets ls Mane eee eee Pachyschelus 
14, Dorsal plate marked by two moderately separated dark-brown lines 
which converge anteriorly; breeds in alder________ Eupristocerus 
Dorsal plate marked by a single median bisecting line; attacks 
Various-hardwoods: 2323-23) ee ee ee Agrilus 
SPECIES OF BUPRESTIDAE 
The adult of Acmaeodera pulchella (Ubst.), the flatheaded bald 
cypress sapwood borer, is a blackish or blue-black beetle, 6 to 10 mm. 
Jong and about half as wide, with the posterior angles of the thorax 
and wing covers marked by irregular patches or bands of waxy yellow. 
The larva has the form typical of the group, and the plates of the 
prothorax are smooth and marked by a brownish median groove or line 
both above and below. 
This insect occurs in Eastern and Southern States, boring in cypress 
and probably related species. It causes considerable damage to cypress 
girdled or deadened by the lumberman to dry it for logging and 
floating. It also attacks wounds on shade trees and mines the wood 
beneath. 
The adult transforms in the wood in the spring and emerges in 
the early summer to lay eggs on recently dead or dying trees or logs. 
The larvae construct meandering galleries beneath the bark for a 
short distance before entering the sapwood, which they completely 
riddle. 
Cypress to be felled should be girdled in the fall from October to 
December, after the flight period. This permits drying and avoids 
considerable injury. Unseasoned logs should not be left in the woods 
after the spring flight of this beetle has begun. 
The two-lined chestnut borer (Agri/us bilineatus (Web.)) is a 
small beetle, 6 to 10 mm. in length, of a blackish-blue color, with golden 
yellow stripes on the sides of the prothorax and one on each wing 
cover. The larva is more elongate, flattened, and slender than most 
of the Buprestidae and has the last segment armed with a dark-brown 
pincerlike fork. Both plates of the prothorax, which is not so greatly 
widened as in many flatheads, are each marked by a single, median, 
brown line. 
