492 MB. E- I. POCOCK ON THE 



Number o£ segments 43. 



Length : J , 115 mm. ; $ , 80 mm. 



Locality. Porto Hico. 



E,HINOCEICUS HOLOMELATfUS, Sp. n. 

 ? Spirobolus excisus, Karsch, Zeits. Naturwiss. (3) vi. p. 73. 

 Colour black, shining ; antennae and legs o£ the same colour. 

 Face mesially impressed, striolate, frontal sulcus deep; labral 

 sulcus shallow; labrum with 2 + 2 pores, normally emarginate. 

 Antennae not surpassing the collum. JSyes very indistinct, 

 separated by a space equal to about three diameters. 



Collum laterally rounded, without marginal sulcus. The rest 

 of the segments smooth, at most lightly wrinkled longitudinally, 

 striate only inferiorly ; the transverse sulcus very feeble, almost 

 obsolete both laterally and above. Sterna transversely striate. 

 Scohina very deep and large, extending to the 24th or 25th 

 segment, the posterior border of more or fewer of the anterior 

 scobinate segments lightly bi-emarginate. Pores very con- 

 spicuous, far above the middle of the side, just in front of the 

 transverse sulcus, the first below the level of the rest. Anal 

 tergite bluntly angled behind, not surpassing the valves ; valves 

 with lightly compressed margins ; sternite large, posteriorly 

 rounded. 



Legs short, the segments furnished beneath with a single seta. 

 Number of segments 51. 

 Length up to 105 mm. 

 Locality. Jamaica. 



Of this species I have seen three female examples, one adult 

 and one young received from Mr. T. D. A. Cockerell, who obtained 

 them at Moneague and Mandeville, and one dried example pre- 

 sented by Mr. P. H. Grosse. 



In the young specimen the emargination of the tergite is 

 more pronounced than in the adult, and the legs are ferruginous. 

 The specimen sent by Mr. P. H. Gosse is, owing to its method 

 of preservation, of a ferruginous colour. 



Judging by Dr. Karsch's description of R. excisus, the latter 

 is very nearly related to this new form. There are, however, 

 noticeably two points in which it difi'ers, namely, in having the 

 labrum very deeply emarginate and the posterior border of the 

 segments not bisinuate. The last, however, is a variable cha- 

 racter and is only doubtfully valuable for distinguishing species. 



