94 Mr. B. T. Pocock on 



from the base to the front angles, which also are more pro- 

 minent and more acute ; the basal sulci are prolonged over 

 half the disk of the tliorax, and are linear, deeply impressed 

 at their ba-e, and parallel. The whole insect is nearly uni- 

 colorous, but of the four examples before me two are lighter 

 in colour than the others. The anteiinse have their third 

 joint rather longer than the fourth and fifth together, the club 

 is three-jointed and is distinct, the eighth joint being in no 

 way wider than those ])rcccding it. If the figure of A.fusci- 

 pennis is correct, this should not be the case in that species, 

 the antennae appearing there gradually tiiickened without a 

 distinct club. Four examples were obtained by Mr. Marshall. 

 I have also received it from the Congo, from Boma [M. 

 Tschofen). The examples from there are black, and are 

 females, with pitchy antennae, and the joints of the legs and 

 disk of the thorax and other parts more or less pitchy. 



XI. — Descriptions of Three new Forms of Tragelaphus. 

 By R. I. Pocock. 



Early in the spring- of 1898 my colleague Mr. Oldfield 

 Thomas, who was unhappily compelled by ill health to 

 abandon for the time being all zoological work, kindly asked 

 me to undertake, with Dr. Sclater's acquiescence, his share of 

 the preparation of the systematic and bibliographical section 

 of the part of the ' Book of Antelopes ' dealing with the 

 TragelajihinaB, so that no delay in the completion of the work 

 should be caused by his enforced absence from London. At 

 the suggestion of the joint authors of this work, the tliree new 

 forms of Bushbuck, which came to light during the investi- 

 gation of the species of the genus Tragelaphus, are described 

 in the following pages prior to their appearance in the forth- 

 coming part of the ' Book of Antelopes,' in order that the 

 responsibility for them should, rightly, rest solely with me. 



Tragelaphus scriptus (Pallas). 



To the known subspecific forms of this species, namely 

 T. scriptus ti/picuSy decula, sylvaticus, and Roudleynei, the 

 following two may be added : — 



Subspecies ornatus, nov. 

 Adult male of the same size and much the same general 



