OF TROPICAL AFRICA. 209 



impressed space with raised margins. The sides of the head in front of the eyes are 

 produced and elevated above the insertion of the antennie. The prothorax, or rather 

 the pronotum, is marked in the sex possessing the two patches on the second abdominal 

 segment (and which I regard as indicating the female') with a deep and large puncture 

 on the middle of the anterior margin, which is wanting in the individuals which have 

 not the abdominal patches. These patches are of considerable size and of a somewhat 

 triangular-ovate form, the narrow end being placed inwardly, and turned towards the 

 posterior margin of the segment. The legs, in all the specimens I have seen, present 

 no sexual distinguishing character. The middle and posterior tibis are scarcely thicker 

 at the tip than in the middle,— they are nearly straight ; the anterior tibis beneath are 

 thickly and roughly punctured, and the tarsal joints are slightly produced beneath. 

 The spur of each of the fore tibiae is small, and forms the tip of the intermediate apical 

 finger ; the four hind tibiee have the spurs of equal size. 



I consider the figure given by Guerin in the ' Iconographie du R^gne Animal, Insectes,' 

 pi. 30. fig. 5, to represent this species. Various details of it are also represented in 

 Mr. Hope's ' Coleopterist's Manual,' part iii. pi. 3. fig. 3. a— I. 



I likewise regard the figure published in Erman's ' Reise um die Erde,' t. 15. f. 11, 

 as intended for the digitata of Fabricius, although it is represented as being only 15^ 

 lines long, which may however perhaps be considered as proving it to be rather a large 

 specimen of the next species. At all events, Dr. King's observation, that Lamarck's 

 Ufeneslra " ist sehr wahrscheinlich dieselbe art in dem Beschreibung und Abbildung die 

 ansehnlichere grosse abgerechnet, sehr wohl passen," seems to me not correct. 



P.S.— Since the above was written I have seen two specimens, in the collection of the 

 Rev. F. W. Hope, brought from Ashantee, of a castaneous colour, the head in one of 

 them being blackish. They both agree together in form, size, and structure ; in one, 

 however, the two abdominal patches are wanting, and the pronotum is marked with two 

 impressed punctures on the disc towards the anterior margin, which are wanting in the 

 other. I consider it most probable, therefore, that these specimens are sexually 

 distinct. 



Species 3. Chiroscelis bifenestrell.\. 

 Tab. XIV. Fig. 2. 

 C. nigra nitida, capite minus rugoso, mandibulis minus dentatis, maculis duabus abdominis 

 ? minuiis rotundatis, margineque antico pronoti haud puncto notato, tibiis quatuor pos- 

 ticisfere rectis ; intermediis ad apicem magis dilatatis. 

 Long. Corp. vix lin. 14. 



Hab. in Guinea. In mus. nostr. Commun. Dom. Raddon. 



There is a very close general resemblance between this and the last. In addition, 



however, to the smaller size, there are several characters which I have not hesitated in 



' I must refer for my reasons for regarding these individuals as females, and the patches as incapable of 



emitting any light (as suggested by Lamarck), to my ' Introduction to Mod. Class, of Ins.,' vol. i. pp. 3'20, 322. 



