338 HENRY L. VIERECK. 



New Species of the Subfamily PSEIVIIV^. 



BY HENRY L. VIEKECK. 



In Can. Ent., xxxi, 223 224, Mr. W. H. Ashmead has tabulated 

 four genera belonging to this subfamily. 



According to the recognized rules of Zoological Nomenclature, 

 Sphex atra Fabr. is the legitimate type of the genus Psen being first 

 designated as such by Latreille himself. 



From this point of view it is necessary to revi.se the names of two 

 and give a new name to one of the divisions in the table referred to. 



The following table is intended to show the genuine types of the 

 four groups, and is as will be seen (excepting names, synonoray and 

 types) a copy of Mr. W. H. Ashmead's table of the Pseninse re- 

 ferred to above : 



Cubitus in hind wings originating beyond the transverse median nervure, the lat- 

 ter short and straight, perpendicular 2. 



Cubitus in hind wings originating before the transverse median nervure, the lat- 

 ter long and oblique or slightly bent, but not perpendicular. 

 Second cubital cell receiving both recurrent nervures, rarely with the first re- 

 current nervure interstitial with the first transverse cubitus, or the 

 second recurrent interstitial with the second transverse ctibitus; inner 

 spur of hind tibiae dilated ; metathorax with a median sulcus, the area 

 at base striate or alveolate ; petiole of abdomen long, usually furrowed 

 laterally ; clypeus convex or subconvex, separated, anteriorly more or 

 less rounded, and with a slight vein, but without a median sinus; lab- 

 rum hidden Miinesa Schuckard. 



= Aporia Wesm. 



[Type Impoxylon equestrie Fabr.] 



Second and third cubital cells each receiving a recurrent nervure. or the first 



recurrent nervure is interstitial with the first transverse cubitus ; head 



with a spine between the antennae; clypeus anteriorly rimmed with a 



median sinus Pseii Latreille. 



= Dahlbomia Wissm. 

 = Mesopora Wesra. 

 [Type Sphex atra Fabr.] 

 2. Submedian cell in front wings a little shorter than the median, the transverse 

 median nervure being not quite interstitial with the basal nervure; 

 second cubital cell usually much narrower above. 

 Second and third cubital cells each receiving a recurrent nervure, rarely 

 with the first recurrent nervure interstitial with tlie first transverse 



cubitus Neofoxia Vier. u. n.* 



Psen Aslini. not Latr. 

 [Type Psen atrafa Pz.] 



Second cubital cell receiving both recurrent nervures PweiiuliiN Kohl. 



[Type Psen fuxcipennis Dahlb. 



* Named after Mr. W. J. Fox of the Academy of Natural Sciences. Philadel- 

 phia, in recognition of his valuable contributions to American HymenopteVology. 



