52 HYLOTOMA GRACILICORNIS. 



less strongly dilated behind the eyes, and the front is 

 more projecting and car in ate. 



H pullata, Zad. (recorded from Prussia and Hol- 

 land) is closely related to it ; it differs in being much 

 larger and broader, in having the head much more 

 developed behind the eyes ; the wings are much darker 

 (deep violet-black, paler in the apical cubital and in 

 the discoidal cellules), the third transverse cubital ner- 

 vure is more oblique, so that the third cubital cellule 

 is longer in upper than on lower side. Pullata feeds 

 on birch. 



3. HYLOTOMA GEACILIOOENIS. 



Vol. II, PI. X, fig. 4, Larva ; 4 a, Segment from the 

 Back. Vol. Ill, PI. I, fig. 7, ? . 



Hylotoma gracilicornis, Klug, Berl. Mag., vi, 287, 4; Htg., 



Blattw., 83 ; Br. and Zad., Schr. Ges. 



Konig., ii, 96, 7 ; Andre, Species, i, 



40; Cat. 5,* 5; Cam., E. M. M., xx, 84. 



pilicornis, Leach, Z. M., iii, 121, 1 ; Ste., 111., vii, 16, 1. 



Ptilia pilicornis, Lep., Mon.. 50, 145. 



Hylotoma cyanella, Klug, Jahrb., i, 231, 24 (1834) ; Htg., Blattw., 

 83, 5 ; Thorns., Hym. Sc., i, 35, 2 ; 

 Br. and Zad., Schr. Ges. Konig., iv, 

 94, 6, pi. iii, f: 10 (lar.) ; Andre, 

 Species, i, 40 ; Cat. 5,* 7 ; Konow, 

 B. E. Z., 1884, 308 and 309. 



Metallic-blue, shining ; antennae, tibiae, and tarsi, black. Head narrow, 

 not developed behind the eyes ; front projecting so that there is a dis- 

 tinct hollow between it and the eyes. Antennal tubercle deep, the sides 

 carinated, and the tubercle is continued as a carina down the face. 

 Clypeus slightly incised. Antennae longer than thorax, rather slender, 

 not much thickened towards the apex. Wings bluish-fuscous; some- 

 what (but not much) lighter towards the apex; third transverse cubital 

 nervure obliquely curved, making the third cubital cellule distinctly 

 longer on upper than on lower side, but in the ? it is not longer than 

 the second cellule. The recurrent nervure in the hind wings is received 

 a little beyond the middle of the cellule. The posterior tibia? are 

 grooved on the inner side ; the anterior tibiae are brownish-fuscous or 

 dirty white in front ; the blotch is large. 



The <$ has the antennae long, slender, not dilated towards the apex ; 

 the third cubital cellule is longer, being distinctly longer than the second 

 instead of shorter, as it is in the $ . 



Length 2 3 lines. 



