THE CANADIAN ENTOMOLOGIST. 227 



5. Antennae g-jointed, the third joint as long as joints 4-6 united ; 



second and third submarginal cells subequai, larger than the first. 



9 Eurys, Newman. 



Antennas lo-jointed, the third joint scarcely as long as joints 

 3-4 united ; second submarginal cell twice as long as the third. 



$ Acherocerus, Kirby. 



Antennae ii-jointed, the third joint long, about as long as the three 

 following joints united. 



Second submarginal cell longer than either the first or third 

 united ; maxillary palpi 6-, labial palpi 4-jointed. 



5 Camptobiium, Spinola. 



Second submarginal cell shorter than either the first or third. 

 Maxillary palpi 4-, labial palpi 3-jointed. 



9 Euryopsis, Kirby. 



Maxillary palpi 3-, labial palpi i jointed. 



9 Decameria, Lepel. 



6. Head subquadrate, the temples broad ; flagellar joints long, each 



giving off a ramus from near the base. ^ Cladomacra, Smith. 



7. Antennae i8-jointed, the flagellar joints scarcely longer than thick, 



each throwing off from near the extremity a long pilose ramus ; 

 hind wings with one discal cell ; head transverse, the temples 

 narrow. ^ Polyclonus, Kirby. 



Family X. — Pterygophorid.e. 



This group by most authorities has been placed with the Chnbicidce, 

 possibly on account of some of the species possessing clavate antennse, 

 similar to Cimbex. The family is, however, structurally, totally different 

 from them, and to me shows no affinity whatever with the Cimbicidce ; it 

 is in every respect more closely allied to the Lophyridce, Perreyiidce and 

 the Selandriidcp., from all of which it is readily distinguished by the 

 absence of the lanceolate cell in the front wings. 



It may be divided into three subfamilies, two of which, however, are 

 not sharply separable, and I have had some difficulty in finding charac- 

 ters to distinguish them. The venation, especially in many of the genera 

 in the subfamily PterygophoriiKz, has been most perplexing, since I find 

 it totally different in the opposite sexes of the same species. Some of 

 the females too have clavate antennae, and thus closely mimic the females 

 in the subfamily Pergince. 



