156 NEMATUS BILINEATUS. 



transverse cubital ; the nervures also are darker and 

 the legs not whitish at the base. 



The antennae are not much longer than the abdomen 

 and metathorax; the third and fourth joints are of 

 nearly equal length ; the last is pale brown beneath. 

 On the head, the orbits, and the face below the 

 antennae, are reddish-luteous, the clypeus sordid white ; 

 the mandibles dark piceous. Cenchri and blotch 

 large, pale white. There are also two small dots 

 on the apex of the abdomen above, and two larger 

 ones on the fifth segment beneath. 



I captured N. antennatus either on alder or birch 

 growing at the foot of Ben Clibrich, Sutherlandshire, 

 at the end of June. The <? I do not know. 



74. NEMATUS BILINEATUS. 



PI. II, fig. 4 <f ; PL VIII, fig. 10, Lar. ; PI. XXIV, 



fig. 3, Saw. 



Tenthredo lutea, var., Fabr., S. P., 41, 58. 



Ulineata, King, Wied. Zool. Mag., ii, 86 (1819). 

 Nematus luteus, Thorns., Opus., 632, 41. 



var. Cam., Ent. M. M., xii, 130. 



Klugi, Thorns., Hym. Scand., i, 136, 65 ; Cam., 1. c. 



bilineatus, Br. and Zad., Schr. Ges. Konig., xvi, 51, 



pi. iv, fig. 7(lar.) ; Cam., 

 E.M.M.,xiii,177; Fauna, 

 37, 36 ; Andre, Species, 

 i, 223 ; Cat., 24, 189. 



The larva was also described by De Geer, Mem., ii, 269, pi. xxxviii, 

 figs. 14, 15. 



Reddish-luteous, the abdomen paler, shining, the basal joints of the 

 antennae above, a spot on the breast, the edges of the metanotum, and 

 two, rarely three, marks on the mesonotum, black. Wings yellowish- 

 hyaline; costa and stigma yellow, the latter rarely black at the base. 



The (^ is entirely luteous, except the black marks on the mesonotum, 

 and the apex of .the last ventral segment is widely emarginated. 

 Length 4 4| lines. 



N. bilineatus can only be readily confounded with 

 N. ruficapillus, from which, however, it may be easily 

 known by its larger size, clearer wings, with the stigma 

 rarely black at the base, and the third cubital cellule 

 longer ; the face distinctly white below the antenna, 



