470 Annals of the Carnegie Museum. 



prominent longitudinal canal, which is also continuous with that of 

 the frontal costa. Frontal costa most prominent above, but con- 

 tinuous to the clypeus, its sides pinched just below the ocellus, but 

 immediately widening. Front with a few coarse punctures and 

 transverse ruga or wrinkles. Antenna? a trifle robust, filiform, 

 about 22- to 23-jointed, considerably exceeding the combined length 

 of the head and pronotum, and under a magnifier exhibiting numerous 

 coarse sensoria. Pronotum with the anterior lobe smooth and 

 rounded above and the sides parallel, the hind lobe strongly divergent, 

 rugoso-punctulate, the disk flattened; transverse sulci deep, coarse 

 and continuous, separating the lobe into nearly equal rounded ridges, 

 the front margin straight and quite widely reflexed, sometimes 

 gently emarginate at middle, hind margin obtusangulate. Tegmina 

 and wings somewhat abbreviated to fully developed and passing the 

 tip of the abdomen, the venation coarse, but comparatively sparse. 

 Legs rather long but not especially robust. The hind femora about 

 reaching the tip of the abdomen. Interspace between the mesosternal 

 lobes much broader than long, the inner margin of the lobes widely 

 rounded. Prosternal spine elongate pyramidal, acuminate. Tip of 

 male abdomen blunt, the last ventral segment short. Valves of the 

 ovipositor hooked, of normal form and medium size. 



The two known species of the genus may be separated as follows: 



Synopsis of the Species of Xestotrachelus. 



A. Only moderately robust. Tegmina complete, the apex broadly rounded, their 

 veins greenish. Hind lobe of pronotum greenish yellow conspersed with 



black; hind tibiae vinaceous hasemani sp. nov. 



A A. Very robust. Tegmina a little abbreviated, more or less acuminate, their 

 veins vinaceous yellow. Hind lobe of pronotum brunneo-testaceous, uni- 

 colorous; hind tibiae internally and below flavous, above and externally 

 coral-red robusta Bruner. 



77. Xestotrachelus hasemani sp. nov. 



Moderately robust, but less so than the insect described by the 

 present writer as Zoniopoda robusta.* Tegmina complete and with 

 the veins olive-green. 



Head but little wider than the anterior edge of the pronotum, its 

 sides about parallel, not so robust as in this sex of robusta, the occiput 

 evenly rounded. Other characters as described for the genus. Head 



4 Annals Carnegie Museum, VIII, pp. 60-62 (191 1). 



