160 NEMATUS ACUMINATUS. 



The spurs reach to near the middle of metatarsus, and are nearly as 

 long as the cerci. Extreme apex of sheath black. 

 Length 3| lines. 



Differs from N. Mlineatus in its longer and clearer 

 coloured antenna, less sharply incised clypeus, in the 

 lighter tint of the body-coloration, narrower head and 

 abdomen, longer spurs, clearer and more yellowish 

 wings, longer third cubital cellule, by the narrower 

 black lines on mesonotum, and on breast, where the 

 black is much narrower ; and by the black marks on 

 abdomen. In the last peculiarity it approaches N. acu- 

 minatus as it does in body form, but the apex is broader, 

 the body stouter, broader, the mouth and tibise are not 

 white, the second and third cubital cellules are longer, 

 the recurrent nervure is received nearer the transverse 

 cubital, and the recurrent nervures in hinder wings are 

 not interstitial. 



Cladich, Loch Awe ; Kingussie in June. 



77. NEMATUS ACUMINATUS. 

 PI. II, fig. 5 ? ; PI. XXIV, fig. 1, Saw. 



Nematus luteus, var. e. Thorns., Opus., 633. 



acuminatus, Thorns., Hym. Sc., i, 138, 68; Br. and 



Zad., Schr. Ges. Konig., xvi, 

 52, 4 ; Andre, Species, i, 216, 

 Cat., 24, 191. 



Antennae shorter than the body by about three-quarters of a line, 

 filiform, tapering towards the apex, the third and fourth joints equal, 

 the rest a little shorter ; the colour luteous, with a black line above the 

 whole of the joints, or more usually only above the first two. Head 

 luteous, covered with whitish down, the part below the antennae 

 and the outer orbits white ; clypeus deeply notched ; the tips of 

 the mandibles brown ; palpi pale ; the ocelli black ; the clypeus and 

 surrounding parts densely covered with white hair. Thorax luteous, 

 densely covered with close down ; the pronotum paler ; breast luteous, 

 very smooth and shining ; the sides of the mesonotum and the 

 metanotum black; cenchri prominent, white. Abdomen luteous; at 

 the base it is narrower than the metathorax, and thence it gradually 

 decreases in width towards the apex, which is acuminate ; the dorsal 

 surface (especially on the basal part) is more or less marked with black ; 

 cerci very long ; the saws considerably exserted. Legs pale luteous ; 

 coxae, trochanters, and tibise whitish. Wings hyaline, faintly yellowish, 



