JAMES A. G. REHN 299 



head and pronotuni together, falling short of the femoral apices by about the 

 length of the pronotuni; form elongate lanceolate, the greatest width contained 

 four and one-half times in the length of the same; costal margin faintly arcuate, 

 apex rather narrowed, rounded, sutural margin genth' arcuate, faintly sinuate 

 near the apex: venation distinct, rather sparse. Wings short, broad, the distal 

 extremity subtruncate; anterior field very narrow. Prosternal process very 

 low, blunt conical, faintly retrorse at the apex: interspace between the meso- 

 sternal lobes strongly transverse, the lobes broadly oblique arcuate; interspace 

 between the metasternal lobes wedge-shaped, the lobes strongly converging 

 caudad. Ovipositor jaws strongly compressed, the tips moderately recvu'ved, 

 the dor.so-lateral margins regularly and strongly serrato-dentate. Cephalic 

 and median limbs relatively short. Caudal femora nearly two and a half 

 times as long as the pronotuni, moderately robust, the greatest depth con- 

 tained four times in the greatest length, pregenicular region slender; dorsal 

 carina very minutely serrulate;'''^ pattern of the paginae regular, well spaced; 

 genicular lobes bluntly acute: caudal tibiae distinctly shorter than the femora, 

 faintly sinuate; dorso-external margins armed with six to seven spines, dorso- 

 internal margins with eight spines: caudal tarsi with the third joint faintly 

 longer than the first and second united; arolia rather small, compressed. 



General color ecru-olive, paling to Isabella color on the tegmina and darken- 

 ing to buffy olive on the dorsum of the abdomen, ventral surface heavily washed 

 ^\■ith fuscous. Head with the genae and face ventrad of the ocellus mustard 

 yellow, the fastigium and adjacent portion of the frontal costa margined with 

 the same, the dorsum of the head and the postocular region blotched with 

 dusky olive-green; eyes deep russet; antennae blackish, lineato-annulate proxi- 

 mad on the dorsal surface, and completely biannulate with antimony yellow 

 distad. Pronotimi mottled dorsad and laterad with dusky olive-green; pleura 

 more clearly of the base color. Tegmina with three large blotches and nu- 

 merous points of dark olive. Wings weakly infuscate, proximad faintly glau- 

 cous. Cephalic and median limbs of the general color annulate with dusky 

 olive-green. Caudal femora on the dorsal and lateral surfaces much blotched 

 with dusky olive-green, the carinae more or less regularly beaded with the 

 same; ventral sulcus washed with russian green; scattered over the carinae 

 and paginae of the caudal femora are numerous rounded areas of the general 

 color, outlined by a dark annulus and containing a smaller dark annulus;''- 

 caudal tibiae cinnamon brown proximad passing into blackish distad, the 

 spines of the same tone, both the dorsal and ventral carinae of the tibiae bear 

 proximad some annular areas similar to those on the femora; dorso lateral, 

 but particularly dorso-external, margins strongly ciliated: caudal tarsi blackish 

 with some ecru olive. 



Length of body, 20.4 nun.; length of pronotuni, 4.5; greatest (caudal) width 

 of pronotal disk, 2.7; length of tegmen, 10.5; length of caudal femur, 12. 



The type of this remarkable species is unique. 



•■'1 As .seen at certain angles this would be called smooth. 



^- It is possible these areas may be analogous to the tubercles described by 

 Bruner as occurring in the same region in the i)eculiar l)ut allied Aptoceras 

 margaritalus (Biol. Cent.-Amer., Orth., ii, p. 2S6, (1908)). 



TRAXS. AM. KNT. SOC, XLII. 



