46 



THE CANADIAN ENTOMOLOGIST. 



the mass is one of convenience, the tip of the abdomen being near the 

 surface, and when disturbed they move to the other side. 



The following dates were recorded: May 11-12, 2nd moult ; May 

 15-18, 3rd moult ; May 26, 4th moult, pupje ; June 11, 5th moult, adults, 

 several pupse still present ; July 5, adults to be found, but gradually 

 disappearing. 



Description of the JVyinp/i. — The colours in the larval state are the 

 same throughout, with minor variations for successive stages. As the 

 nymphs become older and larger the colours are more pronounced, the 

 eyes becoming wholly red and annulate with ochreous. The stages are 

 not simultaneous throughout the colony ; the difference in size between 

 the different stages is noticeable. The wing-pads are faintly seen in the 

 4th stage. 



Third stage, 2nd moult (see figure). — Head, thorax, antennae, beak, 

 legs, eyes, supra- and infra-anal plates, overlapping lips of tergites on 



ventral segments, glabrous black ; 

 '-.^ abdomen, median line of head and 



thorax, edges of prothorax, knees, 

 and two basal articulations of legs, 

 most of thoracic sternum, dorsal 

 thoracic articulations, ochreous 

 yellow ; abdominal sternum blood- 

 red, gradually shading into ochre- 

 ous latero-dorsad. General shape 

 that of an alligator; head prominent, 

 constricted, large, distal two-thirds 

 broadly rounded, hemispherical on 

 dorsal aspect, blunt and subquad- 

 rate on cephalic aspect, basal third 

 as wide as thorax ; antennae short ; 

 setiform, not as long as head, 

  ' 9-jointed, first joint rectangular, flat 



above, 2nd globular, 3rd cylindrical, 

 as long as the next two combined, 

 4th and 5th and next three sub-equal respectively, terminal joint minute, 

 ending in a hiir; the antennae are inserted on the side of the head at the 

 constriction, jusl cephalad of the eyes ; eyes prominent, bulging, 

 comparatively large, situated on basal third of the head, on the lateral 



.,..'-^,.,:,^-. 



,,N.-^ 



Fig- I. 



