82 Tenthredinidae. 



Philomastix, n. g. 

 Antennae 18-jointed in both sexes; cf. lst and 2nd joints 

 short, obconical, the 3rd — 18th infundibuliform, the 3rd twice the 

 lengtb of the 4th, the rest progressively decreasing in length, the 

 18th rounded at apex, and slightly constricted in the middle; 

 9- lst joint obconical, twice the length of 2nd, which is very short, 

 3rd long, twice the length of 4th, 4th— 17th more elongate viewed 

 from above, from below more serrate, last two joints forming a 

 papilliform club, the last joint slightly constricted in the middle. 

 Head twice as wide as long, but not as wide as thorax; eyes large 

 and prominent; clypeus large, not incised; labrum of moderate size, 

 rounded at apex; mandibles with one subapical tooth. Thorax large, 

 rounded in front, channelled in the centre, and at both sides 

 (p. 488) of mesothorax. Legs moderately thick and long, all the tibiae 

 armed with two spurs at the extremity, and the intermediate and hidn 

 ones with another spur on the outer edge, about two-thirds from 

 the base. Abdomen short; in the <$ constricted at the base; in the 

 9 short and thick, the posterior segments short, and raised higher 

 than the base; the saw lance-shaped, with broad teeth on both sides. 

 "Wings: forewings long, one large marginal cell not appendiculate, 

 with four submarginal cells, lst very small, elongate, oval; the 

 transverse cubital nervure with a bulla at its apex, which partly 

 obliterates it; 2nd submarginal elongate, rounded at its base, a little 

 longer than the 3rd submarginal; the latter broadest at apex; 2nd 

 discoidal celi long and narrow, broadest at base; lanceolate cell 

 rather diamond-shaped , petiolated, and with a bulla on either side 

 where the transverse veins join the anal nervure: hindwings mode- 

 rate; inner cubital cell broadest at apex, the transverse cubital vein 

 nearly straight, middle cell wanting. 



(1) Philomastix Nancarrowi, n. sp. 

 9. Body, 5 lines; expanse of wings, 13 lines; antennae, 

 3 lines long. 



Ochreous, marked with black; centre of abdomen steel blue. 

 Head ochreous, ocelli testaceous, eyes dark brown, clypeus pale yellow, 

 shining, with a few shallow scattered punctures, ferruginous at apex; 

 labrum pale yellow; mandibles black; mouth parts and palpi hirsute; 

 first two joints of antennae black, the remainder pale ochreous. 

 Thorax rounded in front, pronotum shining, an impressed line in 

 the centre of mesothorax, the two lateral lobes containing a black 

 patch on either side; the scutellum shining, rounded behind; meta- 



