114 (.Of.EOFTEnA 



Neorchesia gen. uov. 



Body arched above, eloiigate-oval. 



Head immersed up to the eyes, rounded and finely margined behind; 

 tlie forehead truncate in front, and extending beyond the antennal 

 insertion; epistome very sliort and straight; labrum pi-oiiiiiicnt, its 

 apex rounded. Thorax a trifle broader than long. Scutellum strongly 

 transverse, round behind. Elytra elongate-oval, with individually 

 acuminate and divergent apices. 



Mandibles bifid at the extremity. Maxillary palpi stout, basal joint 

 small, the next broadly triangular, 3rd shorter and broader, both of 

 these somewliat prolonged inwardly; the terminal large, broadly cultri- 

 form. Eyes widely distant above, emarginate below the middle in front, 

 eubreniform. .Antennae inserted within the notches of the eyes, eriualling 

 the head and thorax in length; joints 8-11 slightly expanded; basal 

 joint thick, 2nd shortest yet rather longer than broad, 3-5 elongate and 

 nearly equal, 6th and 7th a little shorter. Tibiae not asperate, the front 

 and hind pairs short, middle pair more elongate; spurs of the posterior 

 equal, distinctly pectinate, about as long as the tibiae, and almost 

 the same length as the basal tarsal joint; those of the other pairs short. 

 Tarsi hairy, the anterior dilated, basal joint largest, 2nd and 3rd cordi- 

 form, 4th" i-ather longer than 2nd and bilobed ; the intermediate 

 njoderately slender, penultimate joint i-ather longer than the 3rd and 

 bilobed; the posterior slender, nearly double the length of the tibiae, 

 basal joint twice the length of the 2nd, wliich is about as long as the 

 elongate 3rd and Uh combined. 



Coxae not contiguous, with trochanters; the anterior separated by 

 a triangular, finely margined, gradually narrowed process which extends 

 to their hind part, where it is met by the horizontal, moderately narrow, 

 parallel-sided niesosternal j)i-ocess that sejiai-ates the middle coxae. 

 Front margin of the anterior cotyloid cavities almost touching that of 

 the incurved front of the prosternum. Metasternum elongate, convex, 

 but sulcate, along the middle, the episterna slightly narrowed posteriorly. 

 Abdomen elongate, with 6 segments; basal four gradually decreasing; 

 5th rather longer than 4th, subtruncate behind; 6th much smaller, 

 witli a triangular depression having thickly ciliate margins. 



Resembles JI i/lohin velox, 710, in form, but structurally almost 

 entirely different. The Amercian Synchroa is at once separable by its 

 exserted head, Hallomenus by its emarginate labrum, Eustrophus by 

 the denticulate tibiae. '\\\e only other exotic ally is Orrhexla, wliicli has 

 only 5 abdominal segments and diffeiently formed antennae. Com- 

 parison, through want of space, lias been restricted to easily seen 

 characters. 



3432. Neorchesia divergens sp. nov. 



Subopaque, fuscous, clothed with depressed, slender, ashy pubescence; 

 legs fusco-rufous; the palpi, front, and middle tar^i fulvoscent ; 

 posterior tarsi and the antennae more infuscate. 



Head moderately finely, yet (piite distinctly, punctate. Thorax 

 curvedly narrowed anteriorly, its apex also rounded, anterior angles 

 deflexcd and obsolete; the base subtruncate in the middle, sinuate out- 

 wardly, so that the subrectangular angles seem to be directed .slightly 

 backwards; the punctation on the disc is shallow and indistinct; it is 

 rather more definite in front, and closer at the sides. Elytra as wide as 

 the thorax at the base, considerably narrowed posteriorly, with a 



