50 HYLOTOMA CCERTJLEIPENNIS. 



20 (19) Third cubital nervure obliquely curved; the third cubital 

 cellule much wider above than below. Head not dilated 

 behind, slender. Antennae long and slender. Cyanella. 



1. HYLOTOMA CCERULBIPENNIS. 

 PL I, fig. 5, ? ; and PL IV, fig. 1, Larva. 



Tenthredo violacea, Fabr., Iter. Norw., 64 (1779) ? ; De Geer, 



Mem., ii, 1025. 



cceruleipennis, Retz., De Geer, 72, 300. 

 enodis, Lep., Mon., 45, 127. 

 Hylotoma enodis, Klug, Berl. Mag., vi, 285, 1 ; Htg., Blattw., 81, 



1, pi. ii, f. 1214 (lar.). 

 vulgaris, Klug, Jahrb., i, 230 ; Br. and Zad., Schr. 



Ges. Konig., ii, 88, Taf. iii, f. 6 (lar.). 

 cceruleipennis, Thorns., Hym. Sc., i, 36, 3 ; Andre, 

 Species, i, 38; Cat., 4,* 1; Konow, B. 

 E. Z., 1884, 307. 



violacea, Kirby, List of Hym., i, 55 ; Cam., E. M. M., 

 xx, 83. 



Bluish-black ; antennae, tibiae, and tarsi black ; head and pleurae 

 covered with a black pubescence, abdomen at apex with a silky, paler 

 kind. Antennae short, thickened at the apex. Head dilated behind 

 the eyes ; the fovea between the antennae broad and obtuse. Clypeus 

 slightly incised in the middle. Wings blackish-violaceous, the apex 

 (especially the radial, third and fourth cubital, and the discoidal cellules) 

 paler ; hind wings also paler on lower side and at the apex. The third 

 transverse cubital nervure is almost straight ; the third cubital cellule 

 is not much longer than broad ; the transverse median nervure is 

 received a little beyond the middle. In the posterior wings the trans- 

 verse median nervure is received in apical fourth of the cellule, and the 

 accessory nervure is appendiculated a little beyond the middle. Joints 

 1 and 2 of maxillary palpus subequal ; the third considerably longer 

 than the fourth and slightly longer than the fifth ; the third dilated ; 

 the sixth is the longest, being not much shorter than the preceding two 

 united, and distinctly twice the length of the fourth. 



Length 4 5 lines. 



The larva feeds on the narrow, smooth-leaved wil- 

 lows (Salix alba, purpurea, &c.). It is grass-green 

 according to Zaddach (1. c.) with broad sulphur-yellow 

 lateral folds, the head green, with black eye-spots, and 

 the vertex is marked with black. Bach segment bears 

 transverse rows of brown raised points, each of which 

 ends in a bristle-like hair. The body is convex above, 

 flat on the under side ; it becomes broader towards the 

 middle, then narrows again towards the tail. There 



