IPHIAULAX. 349 



X 29. Iphiaulax argentifrons. (Tab. XIV. fig. 11, ? .) 



/ Ferruginous ; antennis, capite, prosterno pedibusque, nigris ; alis fusco-hyalinis, stigmate testaceo. $ . 

 Long. 8 millim. ; terebra 4 millim. 



Hdb. Guatemala, Capetillo (Champion). 



Antennae stout, scarcely tapering towards the apex. Head with the face, back, and 

 sides covered with rather long pale hair ; the face coarsely obliquely punctured ; vertex 

 and front semiopaque, finely punctured ; no furrow running down from the ocelli. The 

 two furrows on the petiole lie parallel, are finely punctured, wide, and moderately deep, 

 the inner furrow wider than the outer ; centre of the petiole pitted. Second segment with 

 an oblique depression on each side, irregularly reticulated ; a small shining space at the 

 base in the middle, from which proceeds a longitudinal keel ; first transverse furrow very 

 broad, coarsely longitudinally crenulated, the lateral branches short ; second furrow 

 narrower, also crenulated, running laterally backwards towards the base of the segment ; 

 third furrow deeper, shining, impunctate. Wings light fuscous, the stigma testaceous, 

 the nervures fuscous ; recurrent nervure nearly interstitial. 



A broader species than I. aztecus ; the wings lighter in tint ; the recurrent nervure 

 not interstitial ; the antennae stouter ; the head much more densely clothed with hair, 

 especially above the antennae ; the second segment wrinkled and striated throughout, and 

 the central keel narrower. The knees, the apical joint of the trochanters, the base and 

 apex of the hind coxae, and the apices of the fore tarsi are testaceous. 



b. The second furrow not striated. (Species 30-32.) 

 a. The sides of the second segment on either side of the keel striated. (Species 30 & 31.) 



X 30. Iphiaulax montezuma. (Tab. XIV. fig. 12, $ .) 



Terrugineus ; capite, antennis, prosterno pedibusque, nigris ; abdomine quam thorax longiore ; alis fuscis, stigmate 



nigro. $ . 

 Long. 10 millim. ; terebra 5 millim. 



Hah. Mexico (Bilimek). 



Antenna? a little longer than the body, moderately stout, tapering towards the apex. 

 Head sparsely clothed with hair ; face finely aciculate. Thorax impunctate, the breast 

 and metathorax pilose. Petiole with the furrows very broad ; the outer furrow narrowed 

 at the base, the inner one obscurely pitted, the keel separating the two stout, oblique, 

 and covering the outer furrow at the base ; the centre with a keel down the middle ; 

 the sides somewhat rough. Second segment with an oblique depression on each side ; 

 a keel down the centre, originating in a broad, smooth, shining space ; the surface 

 roughened, with a few longitudinal irregular keels ; first transverse furrow broad and 

 deep, longitudinally coarsely striated, the middle as deep as the sides; apical fork 

 deeper than the basal one ; second transverse furrow deeper than the first, but narrower. 

 The depression at the base of the fourth segment deep, narrower than the second 



