66 GENUS SCHIZOCEEA. 



for the greater part bluish-black, with a black fascia at extreme base of 

 radial cellule. 

 Length 3 lines. 



Easily known from cyanocrocea by the totally bluish - 

 black femora, black antennae, and yellowish wings, with 

 only a very small fascia in the radial cellule. H. 

 mediata, Fall., differs from it in having the base of 

 abdomen bluish-black, the belly marked with black ; 

 there is a large fascia below the stigma, while there is 

 no black on the posterior femora. 



Rudow (1. c.) describes the larva as being green, 

 darker on the back, with two yellowish dorsal stripes 

 and yellow apex of abdomen. The thoracic legs are 

 yellow, claspers green. It feeds on Salix fragilis. 



Common in the South of England, London district, 

 New Forest, &c. 



Continental distribution : Finland, Sweden, France, 

 Russia, Germany, Austria, Bohemia, Hungary, Tyrol. 



Genus SCHIZOCERA . 



Schizocere, Latr., Faui. Nat., 442. 



Schizocerus, Ste., 111., vii, 19. 



Schizocera, Htg., Blattw., 87. 



Cryptus, Leach, Z. M., iii, 121, 125, nee Auct. 



Cyphona, Dbm., Consp., 6. 



Radial cellule not appendiculated ; four cubital cellules ; lanceolate 

 cellule longly contracted. Posterior tibiae not spined ; $ with the third 

 joint of antennae cleft in two, ciliated. 



Thomson splits up Schizocera into two genera 

 Schizocera having, according to him, the lanceolate cel- 

 lule petiolate and the antennae inserted over the cly- 

 peus, and Cyphona with the antennae well up on the 

 front and the lanceolate cellule constricted. In some 

 species of Schizocera the lanceolate cellule is certainly 

 constricted, and, I believe, this is the case with all of 

 them, only the basal portion of the accessory nervure 

 is very short and not always easy to see. The form 

 of this cellule, therefore, cannot serve to separate gene- 

 rically the two divisions, while I find so many grada- 



