THE CANADIAN ENTOMOLOGIST 131 



Antennae yellow. Food-plant unknown. 



Ill aristata Malloch. 



4. Frons black....; 5 



Frons reddish 10 



5. Last section of fifth vein much longer than preceding sec- 



tion 6 



Last section of fifth vein shorter than or subequal to pre- 

 ceding section 7 



6. Last section of fifth vein about 23^2 times as long as preced- 



ing section. Food-plant unknown. II! indecora, n. sp. 



Last section of fifth vein less than twice as long as preceding 

 section. Larvae mining cambium of Prunus domestica. 

 N. Y pruni Grossenbacher. 



7. Squamae gray, fringes brown; last section of fifth vein nearly 



as long as preceding section. Food-plant unknown. 



N. H.; Europe suhnigripes Malloch. 



Squamce whitish, fringes pale; last section of fifth vein slightly 

 more than half as long as preceding section 8 



8. Pubescence on arista indistinct; occiput projecting on upper 



half; mesonotum with 4 pairs of dorso-centrals; cross- 

 veins separated by about the length of outer cross-vein. 



Food-plant unknown. Ill aprilina Malloch. 



Species without the above combination of characters; cross- 

 veins separated by about twice the length of outer cross- 

 vein 9 



9. Pubescence on arista indistinct; occiput not projecting; 



mesonotum with 3 pairs of dorso-centrals. Food-plant 



unknown. N. M ahhreviata Malloch. 



Pubescence on arista distinct; occiput projecting on up- 

 per half; mesonotum with 4 pairs of dorso-centrals. 



Food-plant unknown. Alaska kincaidi Malloch. 



10. Mesonotum with 2 pairs of dorso-centrals; humeri yellow; 

 general colour glossy black; small, robust species, 1.5-2 

 mm. in length. Food-plant unknown. 



Md.; Ill nitida Malloch. 



Mesonotum with 4 pairs of dorso-centrals 11 



