l74 THE CANADIAN ENTOMOLOGIST, 



Stage F/.--Head shining white, a large black patch coveiing, btit 

 mostly behind, the eye ; a rounded grayish black patch on vertex, finely 

 white punctured; width, 2.1 mrn. Body white, dorsal and subdorsal 

 broad blackish olive shade bands on joints 2-13 ; anal plate black. 

 Abdomen neatly annulate ; feet all white. 



Stage VII. — Head as before, but slightly pruinose ; width, 2.5 mm. 

 Dorsum to spiracles black, leaden or greenish centrally, the colour 

 diluted on joint 2 anteriorly and before the black anal plate. Feet all 

 white ; a black patch on the lower subventral fold. Segments neatly 

 7-annulate. 



Stage VIII. (ultimate). — Head sordid pinkish, waxen, shining; 

 width, 2.4 mm. Body the same colour, with a darker dorsal band and 

 broken lateral one ; segments 7-annulate. 



Single brooded, forming cells in the earth. Found on the hickory at 

 Bronx Park, N. Y., and Bellport, Long Island, during July. 



Determined by Mr. Ashmead, from one bred 9 > 'TS a vaiiety of M. 

 externa. Specimen labelled " 8 P." 



According to Mr. W. H. Ashmead's classification, the described 

 species of Xyelidte are as follows : 



Macroxyela, Kirby. 



1. ferrngiiica, Say. 



2. tricolor, Nort. 



3. i/i/uscata, Nort. 



4. aenea, Nort. 



Megaxyela, Ashmead. 



5. major. Cress. 

 Pleuroneura, Konow. 



6. aviingrata, Dyar. 

 Manoxyela, Ashmead. 



7. califoriiica, Ashm. 

 Xyela, Dalman. 



8. minor, Nort. 



Genus Macroxyela. 



The larva; of this genus are all unknown. The long ovipositor of the 

 ^ suggests an internal feeder. 



