44 THE CANADIAN ENTOMOLOGIST. 



Fourt/i stage. — Head angularly pyriform in outline, narrowing up- 

 ward, widest above the eyes ; partly retracted below joint 2 ; smooth, 

 shining black ; width, 0.5 mm. Body very thick through the thoracic 

 segments, more slender posteriorly, then gradually tapering. Thoracic 

 feet covered to the dorsal view ; tinged with blackish ; abdominal ones 

 present on joints 6-12, 13, the larva resting on them on the surface of the 

 leaf. Colour slightly greenish, transparent, shining and sticky; alimentary 

 canal plainly visible. 



Fifi/i stage. — Not different. Head brownish-black; width, 0.7 mm. 



Sixth stage. — Head shaped as before, but of a pale whitish-yellow, eye 

 black ; width, 0.7 mm. Body not shining, scarcely more than trans- 

 lucent, of the same yellowish colour as the head, and marked with orange 

 on the sides of the enlarged thoracic segments. Two transverse, dorsal, 

 watery lines on each joint 5-13, the anterior one short, the other reaching 

 the sides. The larvae now form a cavity in the earth, lined with a brown 

 secretion. 



Nemattis co'ryli, Cresson. 



Eggs. — Laid on the midrib in the manner of Crctsus latitarsus, in a 



central incision. 



****** 



Second stage. — Plead black ; width, 0.45 mm. 



Third stage. — Head rounded, shining blackish, mouth a little paler ; 

 eye black; width, 0.65 mm. Body shining, annulate, whitish, the ali- 

 mentary canal giving a distinct light-green shade. Thoracic feet largely 

 black. A row of blackish spots along the sub-ventral ridge ; a pair of 

 black, conical, anal projections. Abdominal feet present on joints 

 6-11, 13. No tubercles. 



Fourth stage. — Head round, shining black ; width, 0.9 mm. Body 

 shining, coarsely 4-annulate, smooth, with minute setce seen with a lens. 

 Colour uniformly slightly olivaceous-green; thoracic feet marked with 

 black at base and tip. A series of large olivaceous patches ventrally on 

 joints 6-10. 



Fifth stage. — Head flat before with clypeal dents ; shining black ; 

 width, 1.25 mm. Segments shining, 4-annulate, setse with inconspicuous 

 concolorous bases. Colour olivaceous-green, shaded with leaden-blackish 

 subdorsally and on sub-ventral ridge. Venter blackish, with eversible 

 glands as in the mature larva. 



Sixth stage. — Head round with a row of indentations bordering 



