ENTOMOLOGICAL SOCIETY OE ONTARIO. 



71 



7. Agrilus bilineatus, "Web. This pretty little beetle is more elongated and in shape 

 strongly resesembles the Red- necked Agrilus (A. ruficollis) (Fig. 73) 

 which forms the gouty swellings on raspberry canes (Fig 74). 

 It is about three-tenths of an inch long, and the upper 

 surface is black, or greenish black, with a line of golden pub- 

 escence on each elytron, and on the margin of the thorax (these lines 

 sometimes rubbed off or wanting) ; below the colour is coppery. I 

 have taken it upon beech and believe it to infest this tree. Dr. 

 Packard and Prof. Riley have each found it infesting oak. 



8. Agrilus interruptus, Lee. This species much resembles the 

 preceding, but is somewhat smaller and mpre slender. Its colour is 

 more of a bronze, and instead of the line of pubescence it has & 

 minute golden dot toward the tip of each elytron. I have found it 

 upon beech, birch and hickory, but do not find in my books any 

 records of the trees upon which other collectors have found it. 



9. Brachys aeruginosa, Cory. The larvae of this little buprestid 

 have been found by Mr. V. T. Chambers (Packard. 1. c, p. 519) to 

 mine in the leaves of the beech. The posterior segments are not so 

 tapering as in the larvse of the species previously mentioned. The 

 beetle very closely resembles the following in size and appearance. 



10. Brachys aerosa, Melsh. (B. terminans, Lap) is rather a 

 common beetle with us, and is found most frequently upon the bass- 

 wood, but also occurs upon elm, beech, etc , and may mine in the 

 leaves of all these trees. It has been bred by Prof. Gillette from the 

 leaves of poplar (Can. Ent., vol. xix., p. 138). The beetle is only 

 about one-sixth of an inch long, of a sub-triangular or narrow shield- 

 shaped figure ; general colour coppery, the elytra purplish and 

 ornamented with pubescence, which forms a band across the tips. 

 We have a larger species, B. ovata, Web., which occurs upon oak. 



Fie. 74. 



ClERID^. 



11. Thanoclerus sanguineus, Say. This little beetle is sometimes abundant under 

 the bark, and quickly attracts attention by its bright red colour. It is one-fifth of an 

 inch long and quite narrow ; the head and thorax a duller red than the elytra and legs. 

 It is very active in its movements, and when disturbed quickly hides in a crevice or the 

 burrow of some borer. It is rather beneficial than injurious to the trees upon which it 

 occurs, as it preys upon other insects. 



PtINIDjE. 



12. Eucrada humeralis, Melsh. I have found this beetle under the bark of beech, 

 and as most of the members of this family are destructive insects this may probably be 

 classed as such. It is about one-fifth of an inch long, of brownish colour, with a reddish 

 spot on each shoulder of the elytra which have several rows of punctures. 



13. Ptilinus ruficornis, Say. This small cylindrical beetle which is very frequently 

 found boring ■• pin-holes " in oak and maple, has also been found by me to do the same in 

 old beech trees. The female is one-tenth of an inch long, brownish, with the head bent 

 down under the globose thorax, the elytra faintly punctured. The male is only about 

 half as large and is easily recognized by his prominent red antennte (which give the 

 species it name), the outer joints of which have long leaf-like projections. 



