1899] Harrington — Ottawa Coleoptera. 59 



species being of medium or small size. The most conspicuous 

 is Physocncuinni brevilineiiin Say, a handsome beetle over one 

 half of an inch long ; the thorax is globular, with a conical 

 protruberance on each side near base; the general colour is 

 black, but the elytra are varied centrally with brown and have 

 several short ivory-white lines; the thighs are very conspicu- 

 ously swollen, as in many insects of this group. The last genus 

 Callidium contains two fairly common species of broader shape ; 

 the larger, C. anteyinattnn Newm. , half an inch long, is a fine 

 purplish blue ; the smaller, Q.jaiithiuiiin Lee, from one-quarter 

 to two-fifths of an inch long, is a bright bronze-green, or 

 occasionally bronze. 



Tribe III. Cerambycini is here represented by the solitary 

 genus Elaphidion with two species considered by some authorities 

 identical. Thes2 are cylindrical beetles, reddish or brown- 

 ish, and more or less clothed or mottled with pale pubescence. 

 These beetles are known as Oak-pruners, because the grubs 

 which live in the twigs and branches of the oaks so form their 

 burrows as to cause the portion of the limb in which one lives to- 

 break off and drop to the ground in autumn ; the beetle emerg- 

 ing the following season. 



Tribe IV, Obriini, is represented by three species belonging- 

 to as many genera. Obn'nm rubnim Newm. is a delicate 

 yellowish-red beetle about one-fourth of an inch long. Alorlorchus 

 biniaculatus Say and Callimoxys sanguinicollis Oliv. are readily 

 recognized by their abbreviated elytra ; the latter is the larger 

 and usually has a red thorax. 



Tribe IX, Trachyderini, contains here only P nrpuricemis- 

 hunie)alis Fab., which is one of our handsomest beetles. It is- 

 nearly three-fourths of an inch long ; colour rich velvety black,, 

 with a triangular vivid red patch on the shoulder of each 

 elytron. 



Tribe XI, Clytini, represented by nine genera with thir- 

 teen species, contains some of our finest longicorns. The most 

 conspicuous is Plagionotiis spcciosiis Say, a well-known Maple- 

 borer. This fine insect is about an inch long and of robust shape; 



