IPHIAULAX. 331 



The group of I. dolosus. 



Eyes oblong, distinctly longer than wide, reaching to the apex of the clypeus. Basal 

 joint of the scape thick, not longer than the following three joints united. Abdo- 

 men dilated from the base towards the apex ; the tongue-shaped area in the petiole 

 reaching nearly to the base, the latter not deeply excavated ; not much longer than 

 the head and thorax united. Ovipositor longer than the body. Body luteous, the 

 head and the apex of the abdomen black ; wings yellowish-hyaline, banded with 

 fuscous, the stigma yellow. (Species 4 & 5.) 



1 (2) . Wings black at the base exaltatus. 



2 (1). Wings yellow at the base dolosus. 



V, 4. Iphiaulax dolosus. 



Flavo-testaceus ; capite, antennis, prosterno, pedibus posticis, abdominis apice terebraque, nigris ; alis flavo- 



hyalinis, fusco bifasciatis, stigmate flavo. $ . 

 Long. 17 millim. ; terebra 36 millim. 



Hob. Guatemala, San Geronimo (Champion) ; Panama, Volcan de Chiriqui 2000 to 

 3000 feet, Caldera 1200 feet (Champion). 



Face rugose ; the rest of the head shining, impunctate, except the sides of the frontal 

 furrow which are aciculate. Thorax shining, impunctate, as is also the abdomen. 

 Metathorax at the sides covered with a longish pale pubescence. Abdomen longer 

 than the head and thorax united, gradually dilated to the apex of the fourth segment, 

 thence narrowing to the apex, which is not acute ; the black commencing at the base 

 of the fifth segment. The four anterior legs are luteous, except the tips of the tarsi ; 

 the hind legs black, except the apices of the coxae, the apical joint of the trochanter, 

 the base of the femora, and the tibiae. 



5. Iphiaulax exaltatus. (Tab. XIII. fig. 21, $ .) 



Flavo-testaceus ; capite, antennis, pedibus posticis, coxis tarsisque intermediis, abdominis apice terebraque, 



nigris ; alis flavo-hyalinis, fusco trifasciatis. $ . 

 Long. 16 millim. ; terebra 28 millim. 



Hab. Costa Eica, Cache (Rogers). 



Similar in form and sculpture to /. dolosus, but smaller; the fourth abdominal 

 segment black ; the central part of the petiole reaching nearly to the extreme base and 

 not so sharply pointed, the base itself being not so deeply excavated; the second 

 segment longer compared to the third, and with the lateral furrows deeper; the 

 apical branch of the suturiform articulation straight, not distinctly curved ; the wings 

 black at the base and deeper in tint, in the yellow as well as in the black; the 

 middle coxae and tarsi black ; the hind spurs and knees also black (not yellow as in 



/. dolosus). 



2uu2 



