296 FENUSA HORTULANA. 



It mines the leaves of Ulmus montana and U. 

 campestris, several larvse living on the same leaf. Mr. 

 Healy says there is but one brood in England, namely, 

 In May and June ; but as I have captured the flies in 

 August there is probably an autumnal as well as a 

 spring brood. 



Brischke (Schr. ges. Konig., xi, 71) records Perilissus 

 pictilis, Holmgr., as a parasite. 



Common in England and Scotland. 



Continental distribution : Sweden, Germany, France, 

 Russia. 



4. FENUSA HORTULANA. 



Tenthredo hortulana, King, Berl. Mag., viii, 187 ; Htg., Blattw., 



258, 1. 

 Fenusa hortulana, Cam., Proc. N. H. S. Glasg., iii, 96 ; Andre, 



Species, i, 231 ; Cat., 27,* 1 ; 



Fletcher, E. M. M., xviii, 127. 



Antennae a little longer than the head and thorax, black above, pale 

 testaceous beneath ; the joints distinctly separated, slightly projecting 

 at the apices beneath ; pilose ; the third joint more than double the 

 length of the fourth. Head smooth, shining, covered with a short pile ; 

 the sutures distinct ; antennal fovea large but shallow ; apex of clypeus 

 semi-truncated ; labrum large, rounded at the apex ; labrum and 

 clypeus white; mandibles brownish at the tips; eyes lead coloured 

 thorax, tegulse, pronotum and pleurae broadly whitish-testaceous ; the 

 pronotum whiter than the sides of the breast ; sternum and the lower 

 fourth of the sides black. Abdomen short and broad ; the ventral seg- 

 ments a little whitish at their junction ; sheath of saw projecting, hairy 

 and curved. Legs whitish- testaceous ; the base of coxae black. Wings 

 almost hyaline ; costa and stigma fuscous ; second cubital cellule not 

 much longer than first, and a very little longer than third, but 

 much narrower at the apex than the third ; transverse radial nervure 

 nearly interstitial ; second recurrent received a little in front of the 

 middle of the second cubital cellule. The cenchri are obscure; the 

 blotch is very small. 



Length If line. 



The larva has been found by Mr. J. E. Fletcher to 

 blotch the leaves of Populus nigra in July. 



Seemingly a rare insect. South of England, Wor- 

 cester. 



Continental distribution : Germany, France (?). 



