ENTOMOLOGICAL SOCIETY OF ONTARIO. 73 



More Saw Fly Larvae. 



On the 9th of August, the light shining on a leaf of Popuhcs tremuloides, revealed 

 to me a number of cuts, each about one line in lengthy on the under side of the leaf. I 

 knew tnem to be vacated saw-fly cuts, and immediately looked for the young larvae, On 

 several leaves near by a number of round holes were seen, and looking closely into these 

 I found id every one a black larva extended along the edge inside the opening, When 

 disturbed the larvae threw up their tails in true Nematus fashion. They grew rapidly, 

 and io the night of August the 14th they threw off their dusky covering, and presented 

 themselves in a splendid new garb of dark navy-blue with black dots, and with large 

 yellow spot3 in a line with the black spiracles. The head was glossy black. The legs 

 and underside were of a neutral tint. The length of the full-grown larvae was seven- 

 tenths of an inch. 



On August the 20th the larvae descended and spun loose brown cocoons under the 

 leaves in the bottom of their cage. 1 obtained from these, on the 8th of September, 

 some very handsome saw-flies, of which the following is a description : — 



Length of body, three-tenths of an inch ; expanse of wings, seven-tenths ; length of 

 antennae, two tenths. 



Head black, but with clypeus, hypoclypeal plate, labrum and palpi yellow. Olypeus 

 emarginate rather short. Eyes round and prominent, black. Ocelli black. Cheeks 

 rounded and protruding. Antennae with a somewhat moniliform scape ; the second, third 

 and fourth joints rather long and nearly of equal length, the other four smaller and 

 slightly tapering ; the whole one coloured — black. 



Tegulae and pronotum flavescent ; lateral lobes of scutum dark chestnut-red ; the rest 

 of the thorax and the base of the abdomen black. The abdomen, for the most part, is of 

 a clear, chestnut-red without dorsal markings, but the cerci and ovipositor are black and 

 the last joint is clouded. 



The first and second pairs of legs are flavescent throughout. The hind pair have the 

 tibia — except the knee, which is yellow — and the tarsus black. The tibiae are thickened, 

 and the tarsi end with extended claws. 



The wings are beautifully clear, and in some lights iridescent. Their venation is 

 remarkably distinct, and is of the normal type.^ 



Saw-Fly Larvae on Cornus. 



In the beginning of September there were handsome larvae in great numbers feeding 

 upon Cornus stolonifera Mich, and C. alternifolia Linn. When they first cime under my 

 notice they were curled, helix-like, under the leaves, lying in clusters. The head was 

 glossy black, the body pale yellow ; but down the back were eleven rectangular patches 

 resembling buckles, blue black with yellow centres. There was also a terminal patch, 

 rounded, and of the same colour. The creatures had just changed their skins. They 

 moulted again on the 14th of September. The empty skin was held by the claspers and 

 stood upright. The head-case and seooad segment were split, aad the re3t of the skin 

 was intact. The larvae after the moult were more highly coloured than before. The rect- 

 angular markings on the back were deep navy-blue, and the inner mark and dividing lines 

 were pale blue. The yellow of the rest of the body was of a deeper shade. They moulted 

 again on the 30th of the month, and at internals in October they retired into the earth. I 

 found specimens on the Cornus bushes after the frosts came. 



Captures in September. 



On the 1st I took Plusia brassicce, Riley (Fig. 45. a, caterpillar ; b, cocoon ; c, moth), 

 and Petrophora testata, Linn, at the Gomin. On the 3rd I found Feltia venerabilis, 

 Walker ; Agrotis redimic/la, Morris ; Plussia brassicce, Riley, and Drasteria erechtea, 

 Cramer (Fig. 44), on panicles of Solidago nemoralis, Ait., in the open fields. On the 11th 



