272 THE CANADIAN ENTOMOLOGIST 



beyond the middle in crassicorne), the third sub-marginal cell is 

 as broad above as the length of the second transversocubital ner- 

 vure (hardly more than half as broad in crassicorne) , the median 

 cell of the hind wings is obtusely pointed (very broadly truncate 

 in crassicorne) . Turner remarks: "None of the species of Zoyphium 

 described by me have the tooth on each side of the second (first) 

 dorsal segment mentioned by Kohl in his description of the 

 genus"; Z. crassicorne is also without such a tooth. 



From the other species of Zoyphium, Z. crassicorne is dis- 

 tinguished as follows: 



(1) From Z. erythrosoma Turn, by the small size and quite 

 different colour. 



(2) From Z. rufonigrum. Turn, by the black thorax. The 

 male antennae are very much thicker apically, with a very much 

 larger club, than in rufonigrum; the penultimate joints in crassi- 

 corne are much broader than long. The tooth on the lower side of 

 the mandibles is more broadly rounded than in rufonigrum. 



(3) From Z. kohlii Turn, by the smaller size and red clypeus. 

 The venation is also different; in kohlii the basal nervure goes 

 more basad of the transversomedial, the marginal cell is shorter, 

 and the second recurrent nervure joins the second submarginal 

 cell about the middle. 



(4) From Z. frontale Turn, by the three submarginal cells and 

 the entirely black scutella. 



(5) From Z. doddi Turn, by the larger size; first recurrent 

 nervure joining first submarginal cell considerably more than 

 three-quarters from base*; antenna? further from each other than 

 from the eyes; hypopygium not produced into a spine at apex; eyes 

 distinctly converging above. This is no doubt the nearest relative. 



(6) From Z. dipteroides (Turn.) by the smaller size and black 

 color, 



(7) From Z funebre (Turn.) by the orange legs, wholly black 

 pronotum, &c. 



(8) From Z. rufipes Rohwer by the smaller size, black 

 thorax, &c. 



In one view, the antenna? of Z. crassicorne appear broadly 

 truncate at end. 



*It joins the cell GOS microns from base and 128 from apex. 



