336 HYMENOPTEKA. 



^ 10. Iphiaulax beatus. (Tab. XIV. fig. 18, $ .) 



Rufus ; antennis, capite, prosterno, metathorace, abdominis apice pedibusque, nigris ; alis flavo-hyalinis, fascia 



medio apiceque fumatis, stigmate flavo. $ . 

 Long. 10-5 millim. ; terebra 9 millim. 



Hab. Guatemala, Las Mercedes 3000 feet (Champion). 



Antennae scarcely so long as the body, stout, the third joint distinctly longer than the 

 fourth. Face transverse, faintly rugose ; vertex shining, impunctate. Ocelli surrounded 

 by a furrow ; the part below them hollowed, the hollow with a distinct furrow in its 

 centre ; the face, and vertex to a less extent, sparsely covered with longish pale hairs. 

 Mesonotal sutures distinct ; scutellum not much raised above the scutum. Metathorax 

 with a gradual slope ; the oblique furrow below the stigma not very deep or distinct. 

 Centre of the petiole raised, a broad deep furrow surrounding it, the furrow becoming 

 wider towards the apex, thus contracting the central raised part. In the centre of the 

 second segment is a raised keel, broad at the base, narrowed at the apex, and extending 

 to the apex of the segment ; a broad, oblique depression along the side. A transverse 

 oblique depression at the base of the third segment ; a transverse one on the following 

 segment. Legs densely covered with pale hairs ; spurs fuscous. The central cloud in 

 the fore wings extends between the basal and the first transverse cubital nervure, going 

 straight across, and having a round hyaline spot at the junction of the first recurrent 

 and the cubital nervure ; the stigma is black where the cloud touches it ; the hind 

 wings are uniformly faintly smoky. 



A smaller species than /. trochanteratus, with the thorax almost red ; the abdomen 

 narrower, not being broader than the thorax ; the antennae shorter and thicker ; the 

 central part of the petiole narrowed and rounded at the apex, and consequently the inner 

 furrow is curved (not straight as in I. trochanteratus) ; and the ovipositor longer. 



b. Stigma black. (Species 11.) 



11. Iphiaulax janus. 



Luteus ; antennis, capite, pronoto, pedibus abdominisque apice, nigris ; alis fuscis, apice fasciaque medio 



fumatis. $ . 

 Long. 14 millim. ; terebra 10 millim. 



Hab. Panama, Bugaba 800 to 1500 feet (Champion). 



Antenna? stout ; third joint straight, about one fourth longer than the following one. 

 Face obscurely wrinkled, covered with longish white hair ; clypeus almost transverse at 

 the apex, the sides rounded ; antennal tubercles projecting, longer than broad ; vertex 

 excavated above the antennae ; ocelli raised. Mesonotal sutures distinct. Petiole with 

 the central portion raised ; the apex of the raised part transverse ; the base depressed ; 

 on either side is a broad furrow, which has a few transverse, and not very distinct, keels ; 

 bordering this is a raised carina which is separated from the side by a furrow, the outer 



