476 ME. E. I. EOCOCK OlS" THE 



of retraction inside the segment that bears them ; each consists 

 apparently" of four segments, the distal of whicli is tipped by a 

 long seta, which looks as if it were the distal segment of a 

 normal leg immensely reduced in thickness. 



There are two large penes, capable of protrusion, between tbe 

 second and third pairs of legs. 



Eepuguatorial pores not developed. 



There are no chitinous anal valves or anal sternite, the integu- 

 ment round the anus being membranous. 



I recognize two genera belonging to this family. They may 

 be characterized as follows : — ■ 



a. The bases of the antennse closer together ; 



the antennal socket closed behind Zephroniodesmus. 



Type, sumatranus, Poc. 



b. The bases of the antennse separated by a 



wider frontal space ; the antennal socket 



open behind Glomeridesmus, Gerv. 



Type, porceUus, Gerv. 



Unfortunately I can only judge of the characters of Glojneri- 

 desmus from the St. Vincent species known to me. It may, 

 however, be assumed as probable, on geographical grounds, that 

 this species will prove to be congeneric witb the Colombian 

 species po7-cellus. 



Genus Glomeridesmus, Ge7'vais Sf Goudot. 

 Glomeridesmus, Gervais ^ Goudot, Ann. Soc. Ent. Fr. (2) ii. p. xxvii 

 (1844); iicl. Ann. Sci. Nat. (3) ii. p. 62, pi. v. figs. 4-6 ; Gervais, Ins. 

 Apt. iv. p. 87, pi. 44. fig. 6. 



Gl0meeidesmus maemoeeus, sp. n. (PI. XXXA'^II. figs. 2-2«?.) 



Colour blackisb grey, symmetrically spotted with yellow ; 

 head black, with a transverse yellow band across the summit, 

 and a yellow labrum ; lower surface pale, antennae fuscous. 



Head smooth and shining. Antennse rather short, tbe 3rd to 

 the 6th segments constricted proximally. 



The first tergite evenly narrowed laterally, about as wide as 

 the head. The rest of the tergites evenly arched, lightly trans- 

 versely ridged, ridges curving abruptly backwards laterally; the 

 posterior border straight ; the posterior angle rectangular, but 

 at the posterior end of the body produced into a backwardly- 

 directed spike, which is particularly noticeable on the last 



