86 THE CANADIAN ENTOMOLOGIST. 



men, like Lasiocampa, Ocneria, Bombyx, etc., and soft brown colours. 

 They are exclusively American and seem to be the survival of an ancient 

 form of the family. The two genera may thus be catalogued : 



Bellura, Walk. 

 GORTYNOIDES, Walk. 



densa, Walk. 



vulnifica, Grt. 

 var. melanopyga, Grt. 

 Diffusa, Grt. Sphida, Grt. 



Obliqua, Walk. 



Obliquata, G. & R. 



A TERATOLOGICAL TRIO. 



BY W. HAGUE HARRINGTON, OTTAWA. 



For those interested in teratology I wish to record three instances of 

 malformations of the antennte of Coleoptera. The beetles presenting 

 these have been kindly given to me by Mr. W. Simpson, an energetic and 

 observant young collector of this city. The deformities exhibited are as 

 follows : — 



Fig. 6 — a. Right antenna of a male Dytiscus Harrisii, in which the 

 third joint is enlarged and broadened toward the tip and gives off two 

 branches. The inner of 



these contains eight it \ H ^ 



joints and is quite nor- 

 mal in appearance, but 

 the outer consists of 



only two articles, of OL ^ ,^ 



which the second is Fig. 6. 



short and irregular at apex, and does not seem to have had any more 

 attached to it. 



b. Right antenna of Adimonia cavicollis, in which the second joint 

 is somewhat enlarged and gives off two branches. The inner branch 

 consists of the full nine joints necessary to complete the organ, but these 

 joints are all slightly shortened and broadened, and the branch has a sub- 

 clavate appearance. The outer branch is imperfeet; the first four joints 

 are still more shortened, and are succeeded by two irregular articles, the 

 first of which evidently represents at least two. 



c. Right antenna of Desmocerus palliatus, in which the sixth joint is 

 represented by a small wedge-shaped piece. The seventh is short and 

 thickened, and is set at right angies to the fifth, thus making a sudden 

 bend in the antenna. This malformation is probably due to an injury 

 while the insect was in the pupa state, as indicated by fragments of skin 

 which remained when the beetle moulted. 



