22 OKTHOPTEKA. 



EPISACTUS, Brunner. 



Episactus, Brunner v. W., Ann. Mus. Civ. Gen. (2) xiii. p. 115 (1893) ; Burr, Essai sur les 

 Eumastacides, p. 40 (1899). 



1. Episactus brunneri, Burr. (Tab. II. figg. 15, 15 a, $ ; 16, 16 a, b, e .) 

 Episactus brunneri, Burr, Essai sur les Eumastacides, p. 40 (1899). 



Hab. Guatemala (coll. Brunner). 



EUMASTAX, Burr. 



Mastax, Perty, Delect. Anim. Bras. p. 122 (1830) ; Blanch. ; Serv. ; Burm. ; Stal ; Brunner v. W. ; 



Karsch ; Gerst. 

 Eumastax, Burr, Essai sur les Eumastacides, p. 43 (1899). 



Although but a single species of this genus has been taken in Central America or 

 Mexican territory, five additional forms are recorded from the northern parts of 

 Tropical South America, and are therefore likely also to occur in the State of Panama 

 and northward. These insects may be separated by the following synoptic Table: — 



A. Apex of the vertex above the eyes not visible when viewed from the side. 

 b. Tegmina and wings fully developed. 



c. Posterior femora unicolorous, testaceous or olivaceous, the carinse 

 black, never indistinctly dusky spotted nor with transverse lines. 

 d. Eyes unicolorous. 



e. Pronotum testaceous or ferruginous, marked with a black line 

 on each side. Cerci of male incurved. Size small. Colour 



ferruginous, varied with black [tenuis, Perty.] 



ee. Pronotum uniformly testaceous. Abdomen fuscous, the two 



penultimate dorsal segments bright red. Size small . . . [poultoni, Bur^.] 



dd. Eyes bicolorous [semicceca, Brunner. 1 



cc. Posterior femora varicoloured or ornamented with transverse lines, 

 towards the apex reddish. Abdomen testaceous, with a yellowish 



vitta on each side sur da, Burr. 



bb. Tegmina rudimentary, wings absent. Colour fuscous ; the pronotum 

 bright ferruginous, without a carina, the posterior ridge roundly 



emarginate ; apex of abdomen ferruginous \rosenbergi Burr.] 



AA. Apex of the vertex above the eyes visible when viewed from the side. 



Deflexed lobe of pronotum roundly angled in front [militaris, Gerst.] 



[1. Eumastax tenuis, Perty. 



Mastax tenuis, Perty, Delect. Anim. Bras. p. 123, t. 24. fig. 3 (1830-1834) ; Serv. ; Burm. ; Walk.; 



Gerst. ; Karsch. 

 Mastax virescens, Westw. Arcana Ent. i. p. 100. 



