THE CANADIAN ENTOMOLOGIST. 343 



53. Head dark 54 



Head testaceous or greenish 55 



54. Head black, body orange tinted ; on Primus Q\ 



Head black, body dull olive-green ; on Abies Pack., No. Jjtt 



Head dark brown, body pale reddish-brown ; on 



Abies Pack., No. 36 



Head pale reddish with a black spot between antennae ; on 



Pinus Pack. , No. S2 



55. Anal plates not black spotted 56 



Anal plates with black patches 57 



56. On Corylus Lyda ochreata. 



On Viburnum 6B. 



On Amelanchier 5W. 



On Pinus strobus Pack., No. 83 



m 



57. Antennae all white ; on Populus 5K. 



Antennae black ringed ; on Betula 4K. 



I add descriptions of two species which are here referred to for the 

 first time. 

 Fenusa curtus, Norton. 



Mines on the upper side of the leaves of Quercus macrocarpa, the 

 mature mines about 50 x 10 or 30 x 15 mm. The larva has six stages 

 with widths of head .3, .4, .6, .75, i.o, and i.o mm. The early stages are 

 very similar to the fifth. 



Fifth stage. — Head very flat, the lobes rounded with the ocellus on 

 the dorsal aspect ; mouth projecting in front ; shining pale brown, 

 shading into dark brown on the sides of lobes and mouth ; eye black ; 

 width-, I mm. Body much flattened, rounded posteriorly, the segments of 

 nearly equal width, joint 13 divided by a distinct incisure, the posterior 

 part only half as wide as the anterior ; a rounded subventral ridge. 

 Thoracic feet small, black, almost lateral in position, unused ; abdominah 

 none. A large brown-black cervical shield on joint 2 dorsally and a 

 similar one ventrally between the thoracic feet of joint 2, large, quadrate, 

 brown, bordered with black posteriorly. Colour slightly shining sordid 



tSupposed by Prof. Riley to be Lyda fasciata ; not bred. 

 ttNo. 35 of spruce insects in Packard's 5th report U. S. Entom. Commission. I 

 have included Dr. Packard's undetermined saw-fly larvte only in the case of I^yda, 

 which is such a well-marked genus. 



