THE CANADIAN ENTOMOLOGIST. 243 



The larva have eight pairs of abdominal feet, and are known to feed 

 on the following plants : Prufius, Cratcegus, Sorbus, Lonicera, Ribes and 

 Amelanchier. 



Hoplocampa Hartig may be separated into two subgenera on the 

 length of the malar space. The Nearctic species in some respects differ 

 from the Paljearctic species, although there is a group of species in the 

 west which are allies of the European species. 



Subgenera of Hoplocampa. 

 Malar space as great as or greater than the width of the mandible at base ; 

 eyes short, scarcely twice as long as wide ; ocelli in a low 



triangle MacgilHvrayella Ashmead. 



(Type : MacgilHvrayella Oregonensis Ashmead.) 



Malar space very narrow or wanting, never as great as the width of the 



mandible at the base ; eyes elongate, nearly three times as long as wide ; 



ocelli usually in a curved line Hoplocampa Hartig. 



(Type : Tenlhredo (Allantus) brevis Klug.) 



Species of the subgenus MacgilHvrayella Ashmead. 



Females i. 



Males 2. 



1. Transverse radius oblique and received distinctly beyond the middle 



of the third cubital cell ; (ocellar basin almost wanting j stigma 

 slightly broader at the base ; wings creamy-hyaline, 



iridescent) Oregonensis, Ashm. 



Transverse radius nearly perpendicular and received near the middle 

 of the cell lacteipennis Roh. 



2. Venation pallid-hyaline ; hypopygidium not notched in the apical 



middle Oregonensis Ashm. 



Venation, except stigma, pale brown ; hypopygidium notched in the 

 apical middle xanthura Roh. 



Hoplocampa (Macgillivrayella) Oregonensis Ashmead. 



Macgillivraya Oregonensis Ashtnead, Can. Ent., XXX, lo, 1898, p. 

 257. (Mentioned as the type of genus Macgillivraya.) 



Female : Length, 5 mm. Clypeus deeply, circularly emarginate, lobes 

 rounded at the apex ; antennal fove?e large, extending both above and 

 below, confluent with the supraclypeal fovea; no complete supraclypeal 

 line ; middle fovea not sharply defined, elongate ; no ocellar basin ; post- 

 ocellar line straight and well defined ; lateral ocelli below the supraorbital 

 line: antennae rather slender, the third joint subequal with the fourth ; 



