/EL 



IPHIAULAX. 333 



The general appearance of this species is similar to the preceding, but the keel on 

 the second segment sufficiently distinguishes it ; from the next group it may be known 

 by its more elongated body, the abdomen especially being longer and narrower, by the 

 antennae being longer and more filiform, by the longer and narrower keel on the second 

 segment, and by there being no keel on the third segment. 



7. Iphiaulax sciarius. 



Flavo-testaceus ; capite, antennis, prosterno abdominisque apice late, nigris ; tarsis anticis, trochanteribus ante- 

 rioribus, basi femorum geniculisque late, testaceis ; alis flavo-byalinis, fusco bifasciatis, stigmate nigro. $ . 

 Long. 16 millim. ; terebra 26 millim. 



Hab. Costa Eica, Irazu 6000 to 7000 feet (Rogers). 



Antenna? longish, microscopically pilose, the basal joints of the nagellum very 

 closely amalgamated ; basal joint of the scape nearly as long as the third and fourth 

 joints united, thick, becoming slightly thicker towards the apex, which is transverse ; 

 the second joint of the scape much thinner. Head sparsely covered with longish pale 

 hair on the face and behind ; the cheeks punctured, but not strongly ; the face smooth, 

 shining, impunctate ; slightly concave in the centre ; front slightly depressed ; the 

 furrow leading down from the ocelli wide, but not very deep. Eyes oval, widely 

 distant from the centre of the clypeus ; the head largely developed behind them, but 

 not projecting. Thorax shining, impunctate, sparsely covered with short pale hair; 

 scutellum but slightly raised. Metathorax with a gradual slope to the apex. Petiole 

 deeply and widely excavated at the base ; base of the central part acute in the middle, 

 the apex transverse ; at the apex there is, on either side, a longish depression, which 

 originates before the middle, where it is narrow, becoming wider towards the apex, so 

 that the central portion becomes gradually narrowed; the usual inner furrow is 

 absent (unless it be represented by the above-mentioned depression) ; the outer furrow 

 is lateral, wide, and not visible from above. The keel on the second segment is flat 

 on the top, becoming gradually narrowed towards the apex, which it quite reaches ; 

 there is a depression, double its own width, on either side of it ; the lateral furrow is 

 narrow and somewhat oblique. The suturiform articulation is narrow and straight. 

 On the third segment there is, on either side, a curved furrow, reaching from the base 

 to a little beyond the middle. At the apex of the third segment is a fine transverse 

 groove, beyond which the segment projects at the sides over the fourth on the upper- 

 side ; there is a similar groove also on the fourth segment, the sides of which are also 

 produced laterally above. Legs of moderate length, stout, closely pilose ; the hind tarsi 

 not much longer than the tibiae ; the apex of the four fore coxae, the knees broadly, the 

 basal third of the femora, the tarsi more or less in the middle, the apex of the hind 

 trochanters, the base of the femora, and the base of the tibiae are yellow, the remainder 

 of the legs black. The cloud in the fore wings extends from the base of the first 

 cubital cellule to a little beyond its apex, the cloud being narrowed in the middle ; 

 the apical cloud begins from about the apex of the second cubital cellule. 



