THE CANADIAN ENTOMOLOGIST. 341 



$^. Head green or greenish 34 



Head brownish 38 



Head vinous-blackish i 39 



Head black 40 



34. Body with subdorsal fat-patches JVemafus pingicidorsuvi. 



Body dotted with black Nematus trilineatiis'^ 



Body with lines 35 



Body without lines, green 36 



35. Long, straight, dusky shaded ^D. 



A distinct white subdorsal line ; on Salix 3F. 



Dorsal vessel a double line ; on Betula, etc Pristiphora tibialis. 



A white stigmatal line — 



On Poa, etc Nematus marylandicus. 



On Abies Nematus integer. 



On Vaccinium Pristiphora identidem'^* 



36. On Ribes (gooseberry) Pristiphora grossularice. 



On Betula Nematus lateralis. 



r\ Ti x^-  f Nematus similar is. 



On Robniia \ 



I Nematus robinice. 



On Populus and Salix 37 



On Prunus, eating a curious sinuate hole when young ^K. 



On Azalea, disappearing early in the season ^S. 



37. With black lines on the head ; on Salix Nematus mendicus. 



Without black lines on the head ; larger ; on 



Populus Nematus dorsivittatus. 



38. On Alnus ; green, with blackish shades Nematus Marlattii. 



On Larix ; green with more opaque bands 6D. 



On Prunus, etc.; vinous with obliquely cut white fat-patches . . .^Z. 

 On Carex (on the top of Mt. Washington); pinkish with white 



bands .6T. 



39. On Alnus ; not metallic-green shaded Nematus luteotergum. 



On Betula; with slight metallic-green sh^de^?,. Nematus latifasciatus. 



40. No black tubercles on the body 41 



Black tubercles present 43 



41. With lateral yellow spots 42 



Olivaceous, paler subventrally ; on Larix Nematus Erichsonii. 



^Colour of head not stated in the description, hence this position may be erroneous. 

 **Position of the pale Hne not stated. 



