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 Family THYRIDAE 



A family of small moths, with short and angulated wings with semi-transparent spots, the 

 body is stoutly built, the antennae filiform but thickest in the middle. 



THYRIS III. 

 T. maculata Harr. St. Hilaire VII (Ly); Montreal VII (Gb). 



Family COSSIDAE 



A family of large moths, with small heads and short antennae and palpi, tongue wanting. 

 Body long and conical usually projecting half its length beyond hind wings. Wings thinly 

 scaled, the males often very much smaller than the females, the latter being clumsy fliers. 

 The larvae are borers in forest and shade trees, at first feeding under the bark and later boring 

 into the heartwood. 



COSSUS Fabr. 

 C. centerensis Lintn. Cowansville (Fy); Montreal VII (C); food plant: poplar trunks. 



PRIONOXYSTUS Grt. 



P. mcmurtrei Guer.-Men. Montreal VI (W); food plant: oak trunks. 



P. robinlae Peck. Cowansville (Fy); St. Hilaire VI (W); Montreal VI (W); Chateauguay VII 

 (J); food plants: trunks of locust, poplar, elm and oak trees. 



Family SESIIDAE 



A family of wasp-like moths, with straight narrow forewings, the hind wings usually more 

 or less transparent — the hind legs long and often brightly coloured, antennae spindle shaped, 

 often pictinated in the male. The larvae are all borers in the stems or roots of living plants. 



MELITtIA Hubn. 

 M. satyriniformis Hubn. Eastern Tps. (Fy); food plant: squash stems. 



ALCATHOE Hy. Edw. 

 A. caudata Harr. Montreal VII (C); food plant: clematis roots. 



