GENUS FENUSA. 291 



The labial palpi are short ; the first is scarcely shorter 

 than the third ; the second is nearly three times longer 

 than the third ; the last is nearly as long as the pre- 

 ceding three. The mandibles are short, thick, the 

 apical tooth distinct, and there is a blunt subapical 

 one. 



The larvas are similar in form and habits to those 

 of PhyUotoma, only no cocoon is spun in the mine. 



The body colour is black ; the legs are also usually 

 black, ^relieved with white, or they may be testaceous 

 entirely. The wings are never hyaline; they being 

 more or less smoky. The stigma is large and projects 

 a little from the costa ; it is usually fuscous. 



This is a genus of small extent ; the three cubital 

 cellules place it alongside PJiijllotoina and Fenelln, 

 with which the species agree in the form and habits 

 of the larvaB ; but undoubtedly it has strong affinity 

 with one section of Blennocampa as already pointed 

 out (p. 230). The difference in the number of joints 

 in the antenna readily distinguishes it from Phyllotoma 

 and Heptamelus ; but it is not so easily distinguished 

 from Fenella ; in fact, the only distinction seems to be 

 that Fenella has more than nine joints in the antennae 

 (the number in Fenusa being nine). 



The genus is confined to the Palaearctic and Nearctic 

 regions. Eight European and two North American 

 species have been described. 



06s. The genus Kaliosyphinga, Tiscbbein (S. E. Z., vii, p. 79, 1846), 

 is no doubt identical with Fenusa. In most of the species of Fenusa, 

 but especially with pumila and melanopoda (with either of which the 

 description of K. Dohrnii, so far as it goes, agrees), there is at the base 

 of the lanceolate cellule an upturned nervure or spurious nervure (for it 

 is much fainter than the regular nervures), whioh is joined or nearly 

 joined to the anal nervure, thus giving the appearance of their being a 

 contracted lanceolate cellule, which is the only distinction (the posses- 

 sion of a contracted in opposition to the petiolate lanceolate cellule of 

 Fenusa} between Kaliosyphinga and Fenusa. 



The Genus Messa, Leach; (Z. M., iii, 126), is said to be founded on 

 Fenusa hortulana, but in error, for Messa is stated to have one radial 

 and four cubital cellules. It was probably founded on a small Nematus. 

 Stephens' type is a Blennocampa. 



