THE CANADIAN ENTOMOLOGIST. 289 



5. Pronotum almost as long as the mesonotum ; fourth joint of front tarsi 



much longer than the third, the first not or scarcely longer than the 

 three following united ; maxillary palpi 5- 



jointed (5) Chelogynus, Haliday. 



(Type C. fuscicornis, Hal.) 



Pronotum much shorter than the mesonotum ; fourth joint of front 



tarsi scarcely longer than the third, the first not longer than 



the three following united ; maxillary palpi 4- 



jointed (6) Anteon, J urine. 



(Type A. jurineanus, Latr.) 



6. Pronotum much longer than the mesonotum, the latter without a trace 



of furrows ; head large, broad (7) Mystrophorus, Forster. 



(Type M. formicaeformis, Ruthe.) 



Pronotum not or only slightly visible from above ; mesonotum well 



developed with furrows (8) Aphelopus, Dalman. 



(Type A. melaleucus, Dalm.) 



7. Front wings with an oval or ovate stigma 8. 



Front wings with a narrow or lanceolate stigma. 



Occiput deeply concave ; vertex and neck separated by a sharp 

 angle ; mesonotum usually with distinct furrows ; front wings 

 with a discoidal cell ; maxillary palpi 4- 



jointed (1) Gonatopus, Ljungh. 



= Labeo, Haliday. 

 Occiput not deeply concave, straight and broad ; front wings 

 without a discoidal cell; maxillary palpi 5- 



jointed (4) Phorbas, Ashmead. 



(Type P. laticeps, Ashm. 



8. Pronotum always much shorter than the mesonotum, sometimes hardly 



visible from above 9. 



Pronotum much longer than the mesonotum. 



Mesonotum with furrows ; maxillary palpi 5- 



jointed (5) Chelogynus, Haliday. 



Mesonotum without furrows ; maxillary palpi 4- 



jointed (7) Mystrophorus, Forster. 



9. Pronotum distinct ; mesonotum with or without a trace of the furrows ; 



maxillary palpi 4-jointed (6) Anteon, Jurine. 



