98 THE CANADIAN ENTOMOLOGIST. 



of ocelli terminating behind in a deep puncture ; clypeus short, scarcely 

 emarginate ; palpi piceous ; antennse long, stout; joints 3 to 9 sub-equal, 

 terminal joint blunt at apex. 



Thorax polished ; tegulae, with a large angulated spot before on pro- 

 thorax, pale rufous ; legs rufous, except base of coxae and tips of some 

 of the joints of tarsi, which are more or less blackish ; wings hyaUne, 

 irridescent ; nervures and stigma black, a spot in centre of second sub- 

 marginal cell, lanceolate cell without crossline, two middle cells in posterior 

 wings. 



Abdomen long, flattened, sides parallel ; segments 2 to 5 of tergum 

 with the apical margin narrowly pale rufous. 



Described from two specimens captured in May. 



6. Tenthredo semicornis. — ^. Black, abdomen and legs partly 

 rufous ; length 0.40 inch ; expanse of wings 0.85 inch. 



Head wider than thorax, excavated in front, with a strong ridge above 

 each antenna ; clypeus, labrum and base of mandibles white ; antennae 

 moderately stout and about as long as the abdomen ; five basal joints 

 black (the third with a narrow rufous ring at base), four terminal joints 

 white, except the extreme apex of last which is black. 



Thorax black, except a white spot on flanks, a larger one above the 

 posterior coxae, and another on lateral margins of the basal plates ; wings 

 hyaline, stigma and nervures blackish ; tegulae and base of costa rufous ; 

 legs ferrugineous, anterior pair paler ; coxae and trochanters partly white 

 with base black ; a line on femora above, a spot at apex of tibiae within, 

 and posterior tarsi, except last joint and base of first, black. 



Abdomen black at base and apex ; segments 3 to 6 rufous, margined 

 with black ; ventre rufous except two apical segments. 



Described from a single specimen captured in the city on 9th June, 

 1886, by Mr. J. A. Guignard. This species has the appearance of ru/o- 

 pediba Nort, with the antennae of grandis Nort., by which it may be 

 easily recognized. 



7. Tenthredopsis Evansii. — %. Yellow, with black and green 

 markings ; length 0.45 inch ; breadth of wings 0.90 inch. 



Head yellow, except an oval black spot surrounding the ocelli, within 

 this black patch are two short yellow lines, one on each side of lower 

 ocellus ; clypeus squarely emarginate, pubescent, as also labrum which is 

 margined with green ; mandible yellow at base, centre green and tip 



