514 ME. W. F. KlllBy ON FOEFICULID^. 



Abdomen long, slightly widened beyond tbe middle, the dorsal 

 segments gradually diminishing in length to the 7th ; 5th and 6th 

 as i£ milled on the hind border; terminal segment very large, 

 nearly square, slightly humped above the inner base of the 

 forcejjs but without teeth ; on the ventral surface it slopes 

 backward, so that the penultimate ventral segment, which is 

 subtriaugular and reaches nearly to the extremity of its ventral 

 portion, not only leaves the sides widely uncovered, but also 

 that part of the lower surface, really belonging to the dorsal 

 jportion, which slopes backwards between the base of the forceps. 



Forceps rather long and stout, widely separated at the base, 

 with several blunt teeth beyond the middle, and curved up- 

 wards. 



Legs moderately long and slender, clothed with short hairs ; 

 first joint of the tarsi densely hairy beneath ; front femora 

 rather shorter and stouter than the others. 



Female with the forceps long, contiguous, unarmed, slightly 

 apeurved, and crossed at the extremity. 



Allied to Lahidura ; type D. Batesi, sp. n., but will also 

 include L. Livida, Dubr., and some other American species. 



Demogorgon Batesi, sp. n. (Plate XII. figs. 3, 3 a.) 



Long. corp. 36 niillim. ; segm. ult. cum forcip. 15 millim. 



Male. Yellowish, the front of the body inclining to grey, the 

 abdomen to tawny ; mandibles blackish ; tegmina with the 

 suture shading into tawny. Abdomen with the segments finely 

 punctured towards the extremity, segments 5 and 6 very strongly 

 milled ; last segment smooth above, with a depressed line on the 

 middle ; segments 2-7 above and beneath blackish in the middle 

 towards the extremities, and segments 8-6 are also blackish on 

 the upper part of the sides ; forceps shading into blackish towards 

 the extremity. 



Sah. Santarem. 



Closely allied to D. livida, Dubr., though nearly twice the 

 size ; but the eyes are unicolorous, whereas in D. livida they 

 are deep black. 



Demogoegon bicoloe, sp. n. 



Long. Corp. 29 millim. ; segm, ult. cum forcip. 10 millim. 

 Male. Luteous, inclining to reddish ; head beneath, pectus, 

 and base and sides of the abdomen paler. Eyes black. Pro- 



