THE CANADIAN ENTOMOLOGIST. 



107 



Phymatodes, Muls. 



Contains a number of species, all of rather small size and usually 

 bright colour. The prothorax is rounded, usually sparsely punctured and 

 shining. Elytral punctuation distinct, often rather coarse, surface usually 

 shining. The following arrangement of species is taken from Mr. Leng's 

 synopsis : 



A. Elytra without narrow cross-bands. 



b. Thorax dark, elytra of lighter shade before the middle. 



.35-50 in difuidiatus, Kby. 



bb. Thorax rufous with broad black stripe. .25 in . . maculicollis, Lee. 

 bbb. Thorax yellowish ; surface metallic. 



c. Larger species, .50-52 in., elytra and legs yellow, more or 



less marked with blue. variabilis, Linn. 



cc. Smaller species. 



Elytra blue, antennae dark. .20-.32 in. . . .amoenus, Say. 

 Elytra piceous, thorax with more or less distinct dark 



lateral blotches. .34-36 in thoracicus, Muls. 



AA. Elytra with two narrow white or yellowish cross-bands. 

 Usually rufous, elytra dark, except at base. .25-36 



in. (Fig. 17.) varins, Fab. 



These insects are usually to be met with in beating. 

 P. variabilis has been recorded as depredating on oaks, 

 while ammnus bores in grapevines. P. varius is believed to 

 live as a larva in black oak, but I know of no breeding 

 record. 



Callidium, Fabr. 



Two of the species are metallic green or blue, the other is brown or 

 yellowish. They are mostly flatter than Phymatodes, and with heavier 

 antennae, especially in the male. The colour affords a primary means of 

 separating them, C. tzreum, Nevvm., being entirely testaceous or brown- 

 ish, while antennatum, Newm., and Ja?ithinum, Lee, are metallic blue 

 or green above. The last named has the thorax deeply punctured, not 

 impressed, while in antennatum impressions are present and the thoracic 

 punctuation is finer. All the species vary much in size, cereum from 

 .3410.50 inch, while the others run from .25 to .55 \nc\\, Jant/iinum 

 averaging a little smaller. It is reported cereum has been bred from 

 chestnut, while antetinatum depredates on pine. 



Fig. 17. 



