IPHIATJLAX. 337 



side being at a lower level than the keel. Down the centre of the second segment is a 

 broad flat keel, broadest at the base and united to the raised apical part at the apex ; 

 at the base of this keel is a broad semicircular depression, which is deepest down the 

 side ; at the apex of the keel is a curved furrow (very shallow in the centre) which, at 

 the side, bifurcates into two, the basal portion running to the extreme edge of the 

 segment, the other not reaching so far, and being also broader ; at the base of the third 

 segment is a transverse groove. The abdomen is not much longer than the head and 

 thorax together, broad in the middle, narrowest at the apex. The middle fascia in the 

 fore wing is between the transverse basal and the first transverse cubital nervures, but 

 does not touch the former on its lower side ; the latter is interstitial. There is no 

 central fascia in the hind wings. 



B. Suturiform articulation longitudinally striated. (Species 12-14.) 

 a. Wings with a fuscous band in the middle ; legs yellow. (Species 12 & 13.) 





12. Iphiaulax peronatus. 



Luteus ; capite, antennis, abdominis apice, prosterno, apice tarsorum anterioribus, apice tibiarum posticarum 



tarsisque posticis, nigris ; alis flavo-hyalinis, apice fasciaque medio fuscis, stigmate flavo. 5 . 

 Long. 12 millim. ; terebra 8 millim. 



Had. Panama, David in Chiriqui (Champion). 



Antennae stout, microscopically pilose, the scape shining, with a few punctures, and 

 bearing sparse longish hair. Head with rather long whitish hair, the face rugose ; vertex 

 shining, impunctate, depressed in the centre below the ocelli, from which a deep furrow 

 runs to the antennee. Thorax shining, impunctate, sparsely covered with longish white 

 hair ; the oblique furrow below the tegulse broad, deep. The tongue-shaped centre of 

 the petiole separated from the sides by a very deep and broad furrow. A broad, deep, 

 oblique depression on each side of the base of the second segment ; in the centre at the 

 base is a small triangular raised field, which is prolonged as a thin sharp carina to the 

 apex ; the separation between the second and third segments deep, broad, and reticulated, 

 b, broad and deep transverse furrow at the base of the latter. The abdomen is broader 

 than the thorax, broad at the base, becoming broader to the apex of the third segment, 

 then narrowed towards the apex, which is pilose. Legs longish, densely pilose ; apices 

 of the hind tibiae, the hind tarsi entirely, and the four anterior tarsi at the apex, black ; 

 hind spurs fuscous-black. The middle fascia in the fore wing commences at the trans- 

 verse basal nervure, and extends to the base of the stigma, going obliquely across the first 

 cubital to the recurrent nervure ; in the hind wings it is in a line with the cloud in the 

 fore wings ; the apical cloud commences a little beyond the apex of the stigma, touching 

 the upper, but not the lower, part of the second transverse cubital nervure ; in the hind 

 wings it is much smaller. The second cubital cellule is distinctly shorter than the third. 



biol. cente.-amee., Hymenopt., January 1887. 2xx 



