MALCOLM BURR, DERMAPTERA. I17 



Family ChelisoCHIDAE. 

 Genus Hamaxas, Burr. 



Hamaxas quadrituberculatus sp. n. 



Statura gracili ; caput, pronotum elytra, alae nigra ; abdomen 

 fusco-rufino, pedes forcepsque rufì : segmentum ultimum 

 dorsale $ quadratum, margine postice tuberculis 4 instructo, 

 forcipis bracchia S remota, gracilia, elongata, basi depressa 

 ac dente depresso acuto armata. 



6 ? 



Long, corporis 8 — 9 mm. 7 —8.5 mm. 



» forcipis 2.74 — 4.5 mm. 1.5 — 2 » 



Build slender: head, pronotum, elytra and wings black; 

 abdomen blackish red; legs and forceps tawny; the whole 

 body pubescent. Antennae with 16 long, slender, cylindrical 

 segments, black, the apical segments paler; third segment 

 decidedly shorter than the first, fourth a little shorter than 

 the third, fifth about equal to the third and rest gradually 

 lengthening. Head depressed, sutures distinct in the rj\ 

 occiput rather tumid. Pronotum a little longer than broad, 

 convex anteriori}' and rounded posteriorly, the sides parallel. 

 Abdomen very finely punctulate; last 

 segment smooth and quadrate, ample ; 

 in the male at the posterior margin 

 there are two pairs of tubercles, one 

 pair vertical and situate just before the 

 margin, the other pair on the margin 

 itself, and projecting posteriorly; in the 

 Ç there is a slight tumid elevation over 

 the roots of the forceps ; pygidium S 

 not projecting, vertical, smooth, and 

 unarmed. Branches of the forceps : in 

 the <J remote, elongate, arcuate, and 

 slender, depressed at base, and armed 

 there with a depressed, long, acute tooth directed posteriorly ; 

 there is a second, smaller tooth, nearly obsolete, before the 

 apex, and the inner margin is crenulate between the two 

 teeth; in the $, simple, straight, contiguous and unarmed. 



