NOTOGONIA. 55 



pruinose, golden-fulvous at the apex of the hind tibiae and at the x base of the tarsi ; 

 hind tibiae broadly dilated at the base. 



The male, or what I suppose to be such, has the second antennal joint half the length 

 of the third, and curved on the lower side ; the eyes separated at the top by more than 

 the length of the third antennal joint ; and the front tooth on the middle of the 

 mandibles reduced to a mere stump. 



^ 5. Notogonia argentifrons. 



Nigra, dense argenteo-pilosa ; oculis fere dupla longitudine antennarum articuli secumli distantibus ; alia 



hyalinis, apice fusco. 

 Long. 16 millim. 



Uab. Guatemala, Pantaleon 1700 feet {Champion). 



Antennae of moderate stoutness, microscopically pilose; first joint sharply keeled on 

 the lower side, narrowed towards the base and apex, and as long as the second and 

 third joints united; second joint narrowed at the base, about one fourth of the length 

 of the third, the latter a little longer than the fourth. Head finely and closely, the 

 clypeus much more strongly, punctured; apex of the latter projecting, shining, 

 impunctate, and with a slight notch in the centre, the middle with a flat, broad, 

 indistinctly defined keel. Mandibles at the base longitudinally punctured, and densely 

 covered with a piceous-silvery pile ; the other part shining, impunctate, and glabrous. 

 The front, face, cheeks, and clypeus densely covered with silvery pubescence, as are also 

 the lower part of the occiput and the under part of the head. Thorax opaque, very finely 

 punctured ; the sides of the apex of the metanotum with a few stout striae. Prothorax 

 almost entirely covered by the head above ; the pronotum saddle-shaped. Mesonotum 

 with a shallow, broad furrow in the middle in front. Metanotum with a furrow down 

 its centre, the furrow becoming slightly broader towards the apex; metapleurae oblique 

 and broadly depressed in the centre, and finely obliquely striated; middle segment 

 with a deep furrow down its centre, and having a sharply oblique slope. Abdomen 

 with some bluish tints ; the segments at their apices with a silvery pubescence ; the 

 penultimate segment with a golden-fulvous pile. Pygidium apparently longitudinally 

 punctured, densely covered with golden-fulvous or copper-silvery bristle-like hair; the 

 apex truncated, but with a tooth-like projection at either side ; the bristles pale, broad. 

 The ventral surface of the last segment has a distinct curve, and is punctured, as is 

 also the penultimate segment ; the other ventral segments are aciculated, fulvous at 

 the apex. Legs pruinose; the brush on the spur and metatarsus deep reddish- 

 fulvous. Recurrent nervures almost united; second cubital cellule at the top one 

 fourth of the length of the third at the top, and about one half the length of the space 

 bounded by the first transverse cubital and recurrent nervures. 



This species may be known from N. montezuma by being smaller and more slenderly 

 built; the head and thorax bearing a thick silvery pubescence; the basal half of the 



