196 THE CANADIAN ENTOMOLOGIST. 



Harpiphorus tarsatus, Say. 



Determined by Mr. MacGillivray as H. varia/ius, but according to 

 Harrington (Can. Ent., XXV., 59) this name indicates only a variety. 



Egg traces below the lower epidermis, but apparently sawed through 

 from the upper side ; elliptical patches, well separated, in straight rows 

 parallel to a vein or transverse or irregularly distributed ; many on a 

 leaf; size, .8 x 1.2 mm. 



First stage. — Head faintly brownish, eye black; width, .4 mm. 

 Body whitish, rather opaque, annulate, not shiny, the food showing dis- 

 tinctly ; sub-ventral fold prominent in the centre of each segment ; feet 

 on joint 6-12 and 13. 



The larvae sit all in a mass on the back of the leaf, flat on the venter, 

 and eat the parenchyma from below. 



Secojid stage. — The same. Width of head, .55 mm. Later the 

 larvae rest curled spirally and become covered with a white woolly 

 coating. 



Third stage. — Head, .65 mm. No change in colour. 



Fourth stage. — Head, .8 mm. 



Fifth stage. — Head, i.i mm. 



Sixth stage. — Head, 1.5 mm. 



Seventh stage. — The larvae rest flat on the back of the leaf, curled, 

 the anal end inside of the spiral and slightly lifted. 



Head round, full at the vertex, highest centrally, clypeal sutures well- 

 marked ; smooth, black, covered with a white mealy substance nearly 

 obscuring the surface ; palpi, an area around the mouth and the distinct 

 antennae, pale yellowish ; ocellus black ; width, 1.8 mm. Thoracic feet 

 rather small with black hooks ; abdominal ones on joints 6-12, 13, large. 

 Segments rather coarsely 6-annulate, the intersegmental incisures scarcely 

 more distinct ; sub-ventral fold well-developed, undulate. Nearly opaque 

 honey-yellow, all the dorsal region to sub-ventral ridge covered with a 

 mealy white secretion, partly or wholly obscuring the surface, or even 

 growing out into filmy threads nearly i mm. long. Anal plate small, 

 rounded-quadrate, black. 



The white secretion is formed afresh after each moult. 



[to be continued.] 

 Mailed July 2nd, 1895. 



