IPHIAULAX. 375 



Antennae as long as the body, stout, almost glabrous. Head, thorax, and palpi 

 covered with rather long glistening white hair; the head obscurely punctured; the 

 thorax impunctate, shining. Mandibles testaceous, the tips blackish. Abdomen 

 closely punctured all over, covered with short stiff pile. Petiole with the central part 

 somewhat triangular and truncated (not narrowed) at the apex; the base sharply 

 depressed ; the inner furrow narrow, shallow, placed at some distance from the edge. 

 Second segment with an obscure depression on either side ; the suturiform articulation 

 wide, not much bent, bifurcating near the edge. The furrow on the third segment as 

 wide as the suturiform articulation, that on the fourth narrower. Abdomen scarcely so 

 long as the head and thorax united ; broad, becoming gradually narrower towards the 

 apex, the latter blunt. Apical nervures of the wings fuscous ; the stigma testaceous on 

 the lower side ; the recurrent nervure interstitial. 



67. Iphiaulax jucundus. (Tab. XV. fig. 10, $ .) 



Flavo-testaeeus, antennis, vertice, maculis 3 mesonoti, mesosterno pedibusque nigris; alis fumatis. $ . 

 Long. 6 millim. ; terebra 15 millim. 



Hab. Mexico, Northern Sonora {Morrison). 



Antennae nearly as long as the body, moderately stout, microscopically pilose ; first 

 joint three times the length of the second ; third joint a little longer than the fourth. 

 Palpi black, covered with white hair ; tips of the mandibles black. Face covered with 

 long white hair, finely rugose, a transverse black mark above the centre ; front and 

 vertex shining, impunctate ; the front above the antenna? depressed, the depression 

 distinctly margined at the top, and with a furrow running down its centre, the two 

 lateral spaces rounded on either side of the furrow. Petiole strongly punctured, the 

 punctures above large and clearly separated ; the inner furrow very wide and shallow, 

 the outer furrow narrower and deeper and ending a little in front of the middle, where 

 the petiole itself commences to widen. Abdomen coarsely punctured, much wider 

 than the thorax, rounded at the apex ; an oblique wide depression on either side of the 

 second segment at the base, the part immediately behind the depression shining, im- 

 punctate ; first transverse furrow wide, its basal branch narrow, shallow, the apical 

 branch the width of the furrow itself; second furrow narrow and, like the first, 

 longitudinally striated. The upper half of the head (except the orbits narrowly), the 

 prosternum, a mark on each side of the mesosternum, the mesonotum in front, the legs 

 (except at the joints), and the bases of the hind coxae, are black. 



^^68. Iphiaulax bellicosus. (Tab. XV. fig. 13, $ .) 



Flavo-testaceus, antennis, vertice pedibusque nigris, coxis posticis basique femorum runs ; alis fumatis, stig- 



mate nigro. $ . 

 Long. 8*5 millim. ; terebra fere 2 millim. 



Edb. Mexico, Northern Sonora {Morrison). 



