310 J. Wood-Mason— iJWwojM'aw and Oriental Bepresentatives [No. 3, 



Genus 5. j35thalocheoa, W.-M. 



JEthaloohroa, Wood-Mason, Anu. & Mag. Nat. Hist. 1877, vol. six, ser. 4, p. 

 808, cT ¥ . 



Arsacia, StU, Bill. Sv. Kongl. Vet.-Akad. Handl. 1877, Bd, iv, No. 10, p. 70, ? . 



c? 5 . Sexes alike. Body greatly elongated, bacilliforni, 



Head of moderate size, not wider than tbe dilatation of tlie 

 pronotum ; occipat concave ; vertex divided by grooves into five 

 lobes, two lateral, wliicli are always conoidally produced or swollen, 

 two sub-median, wkicb. may or may not be produced, and one median 

 forming a horizontal transversely convex elevation of considerable 

 antero-posterior extent wMcli widens sHgbtly to its abrupt termi- 

 nation immediately above and behind the stemmata in a vertical 

 flat area with a semicircular or symmetrically sinuous prominent 

 margin, which appears to coincide with the forks of the epicranial 

 suture and may or may not be produced in the middle line into a horn, 

 which may be simple or bifid ; furnished at the ocular margins of the 

 forehead with a small spine-like tubercle and lower down at the same 

 margin with a faint wrinkle, on each side ; eyes higher than broad, 

 strongly prominulous, tumid, and furnished at the npper and outer 

 angle, or at the junction of the upper and the lateral parts of their con- 

 tour; with a conical non-faceted spine or at least with a minute round flat 

 smooth tubercle ; stemmata large on a three-way tubercle; facial shield 

 pentagonal with its basal angle obtuse and somewhat projecting ; 

 clypeus with a strong mesially interrupted sub-apical transverse ridge ; 

 labrum convex ; antennffi setaceous, much shorter than the prothorax. 



Prothorax granulose : pronotum greatly elongated, steeply roof- 

 shaped as to its slightly bowed posterior lobe, with the top of the ridge 

 surmounted in the female by a prominent raised median dorsal line 

 extending into the anterior lobe, which dorsal line is present in the 

 male only for a short distance from the two ends of the pronotum ; 

 gradually widening from the dilatation to either end. 



2-6 sterna of abdomen with a short sharp carina ending in a point 

 at the middle of their hinder margin, cT 7-8 sterna emarginate at the 

 extremity ; terga with a raised median line which is produced to a point 

 at the hinder end and increases, the point concomitantly decreasing, in 

 strength to the extremity of the abdomen ; 10th tergum flatly roof-shaped, 

 short, about twice as broad as long, rounded at the extremity. Cerci 

 broadly foliaceous, spatulate, rounded or truncate-rounded at the extre- 

 mity. 



Organs of flight when closed hardly extending beyond the apex of 

 the fifth abdominal segment ; their marginal fields subcoriaoeous, 

 semiopaque, the rest of the tegmina membranous, 9 semi-transparent, 



