THE CANADIAN ENTOMOLOGIST. 325 



Cubitus in hind wings ifiterstitial with the transverse median 



nervure Agraptus, Wesmael. 



8. First recurrent nervure interstitial or nearly, the second recurrent 

 received by the second cubital cell near its apex ; anterior tarsi in V 



without a comb Miscothyris, Smith. 



Subfamily II. — Alysoninse. 

 This is a natural group, of small extent, and represented by only two 

 genera, found in both hemispheres. 



The species are somewhat narrowed and elongate, and superficially 

 resemble the PsenincE, in the family Pemphredonidre, although structur- 

 ally they are widely separated. 



Our species have been monographed recently by Mr. Wm. J. Fox. 

 The genera may be distinguished as follows : 



Table of Genera. 

 Submedian cell in front wings much longer than the median, the trans- 

 verse median nervure joining the median vein far beyond the origin of 

 the basal nervure ; abdomen with a pale spot at each side of the 



second segment Didineis, Wesmael. 



Submedian cell of front wings a little shorter than the median, the trans- 

 verse median nervure joining the median vein a little before the basal 

 nervure ; abdomen without a pale spot on each side of the second 



segment Alyson, Jurine. 



Subfamily III. — Nyssoninse. 

 This is also a natural and compact group, allied to the Alysonina, 

 but markedly distinct in the more robust form and by the toothed 

 metathoracic angles. In this last characteristic it shows some affinity 

 with the Stizidte, but otherwise — in mouth-parts, venation of wings, and in 

 its thoracic characters— the subfamily is quite distinct and easily separated. 

 Our species in this group have been monographed recently by Mr. 

 Wm. J. Fox, who, however, has suppressed all genera and placed all our 

 species in the genus Nysson, Latr. Mr. Fox's work is excellent, but I do 

 not believe in such wholesale lumping, and in the following table I have 

 restored all of these genera, making use of such salient characters as I 

 believe will render their recognition easy and certain. 



Table of Genera. 



Front wings with two cubital cells, the third transverse cubitus always 

 wanting c 



Front wings with three cubital cells, the second always petiolate ; if with 

 only two cubital cells, the second transverse cubitus wanting. 



