364 



gites flavous or pink in the middle with a deeper reddish brown patch 

 above the base of the keel , keels flavous ; lateral surface brown above , 

 flavous below; sterna and legs flavous, often there are traces oi a 

 fine dark longitudinal dorsal line. 



Head and first tergite as St. carneum. 



The keels without any anterior border, but larger than in carneum ; 

 the lateral border, as in the last-named species, is not sinuate or 

 dentate, the posterior angle of all the segments is acute, and pro- 

 duced a little beyond the level of the hinder border of the tergite. 



The transverse sulcus is straight, not punctured, and begins on 

 the fifth tergite. The dorsal and lateral surfaces are smooth. The infe- 

 rior keel is developed on the same segments and has the same form 

 as in St. carneum. Caudal process, anal sternite, legs and sternal 

 areas as in carneum. 



cf. More slender than the female. The copulatory foot short, stout, 

 curved, dividing distally into two processes, of which the external is 

 wider , sublaminate , with bifid apex , beneath which are two more or 

 less short thread-like processes, whiles the internal is subcylindrical , 

 pointed, curled and slender; the external lamina constitutes a sheath 

 for the internal. The sternal process of the fifth somite is shorter than 

 in St. carneum. 



Length of 9 26, width 2.3; Length of cf23.5, width 1.7. 



This species differs from carneum in its smaller size, colouring, 

 shape and prominence of keels, form of copulatory foot etc. 



59. Strongylosoma nigricorne, sp. n. PI. XXII, fig. 6. 

 Sumatra: Manindjau. 

 Allied to the St. carneum, but differing on the following features: 

 Colour (when mature) piceous and polished on the upper surface, 

 the apex of the keels being flavous. Antennas black; head brown above. 

 Legs with the three proximal segments, like the sternal surfaces 

 flavous, and the three distal segments piceous; lateral surfaces brown 

 above, flavous below. 



The first segment with its carinal portion narrower. The upper sur- 

 face of the rest of the somites smoother than in carneum, the keels 

 a little larger and with their posterior angles more produced. The 

 transverse sulcus a little more strongly marked, the circular groove 



