FENUSA ULML 295 



Common in birch woods in May and June, and again 

 in the autumn. 



Continental distribution : Sweden, Germany, France, 

 Italy, Russia. 



3. FENUSA ULMI. 



Fenusa ulmi, Sundeval, Forhandl. red de Skand. Naturforsk., 

 Christiania, 1847, 240, 241 ; Healy, 

 Ent., v, 297 ; Kalt., Pfl., 539 ; Cam., 

 P. N. H. S. Glas., iii, 9, 3 ; Fauna, 

 22, 3 ; Andre, Species, i, 230 ; Cat., 

 28,* 8. 

 intermedia, Thorns., Hym. Sc., i, 186, 3. 



Black, shining. Antennae short, stout, covered with a stiff pile ; two 

 first joints together equal in length to the third, which is twice longer 

 than the fourth, the remaining joints to the eighth shorter, the ninth 

 joint conical, longer than the preceding. Head a little narrower than 

 the thorax, scarcely pubescent, shining, smooth, sutures moderately 

 distinct; labruin and mandibles piceous; palpi dark testaceous. 

 Thorax shining, smooth, glabrous; teguhe black. Abdomen short, 

 conical, thick, smooth, semi- truncated at the apex; blotch large, 

 sheaths of saw exserted. Legs : femora, coxae and trochanters black ; 

 apical half of the two anterior femora, knees, tibia? and tarsi, dark 

 testaceous. Wings faintly smoky ; first radial cellule a little smaller 

 than the second, second cubital cellule more than double the width of 

 the base at the apex, angled where it receives the recurrent nervure. 



<$ similar, but with thicker and longer antennae, the joints from the 

 fourth being perceptibly thicker than the basal ones. 



Length ij line. 



Ab. Four posterior tibiae and tarsi black. 



Ulmi is not unlike the two preceding species, but 

 has the frontal sutures less distinct, the wings a good 

 deal clearer, and otherwise is easily separated by the 

 position of the transverse radial nervure which almost 

 touches the second transverse cubital. 



The larva is white, with the head pale brown, darker 

 at the sides ; mouth reddish-brown ; legs encircled 

 with brown. Beneath, on the second segment, is a 

 black oblong plate, sometimes with a dot on either 

 side ; there is a small, black, central dot on each of 

 the following segments, but the dots are often absent 

 on the posterior segments. When full fed it is 

 yellowish-white. Length 5 lines. 



