86 [April, 



pronotum sinuate, and longer than in C. villostis. Explanate margin narrow and 

 of the same width all round, except at the apical angle where it is slightly- 

 widened. Marginal hairs of pronotiun of equal length, except at posterior angles 

 where they are slightly shorter. These hairs are long and stovit and two and a 

 half times the width of the eye in length. 



Scutellum transverse and triangular in shape. The anterior edge is convex, 

 the posterior edge concave towai'ds the sides. The posterior edge forms a minute 

 point fitting into the elytra in the centre where the scutelltun is widest and 

 generally narrows towards the pleura. The metasternum resembles that of 

 villosus by being bottle-shaped, but whereas the posterior margin is sinuate in 

 villosus, it is roiinded in ignotus. 



Elytra transverse, shortest towards the suture and widest towards the sides. 

 The relative increase in breadth at the sides is more accentuated in the present 

 species than in villosus, the lengths at the suture and at the sides being 20,29 in 

 ignotus and 20,25 in villosus. 



The two elytra are adjacent anteriorly but separated at the posterior end. 



The anterior sutural angle of the elytra (i.e., the angle near the scvitellum) 

 is less strongly rounded than the posterior angle in ignotus ; while in villosus 

 these two angles are identical, the posterior being less rounded in villosus 

 than ignotus. There are some very long hairs situated on each elytra on the 

 lateral explanate edges. 



Abdominal tergites. — The hairs of the abdominal tergites one to six are 

 very long and fine, and are evenly and very densely distributed over the whole 

 surface of the tergite. In the posterior row of haiis of each of the tergites one 

 to six are a number of spine-like bristles as well, which lie very flat. The bristles 

 at the sides of the tergites are very long and stout and project well over the 

 sides. 



'The notch on the 4th sternite of the ? is present. Femora stout and 

 clothed with long hairs. Apical tuft of hair very distinct in all the tibiae. 

 Relative lengths of tibijE and tarsi (including claw) of hind leg as follows : — 

 105, 39. In C. villosus they are :^92, 46. 



Total length 12 mm,, and of a uniform width of 6 mm. 

 The type and only known example of this fine species was 

 discovered by Mr. Oldfield Thomas on a bat in the spirit collection of 

 the Natural History Museum, but no other details were recorded. 



Closely allied to Cacodmus villosus, Stal, of which we have been 

 able to examine but three examples, two in the British Museum, and 

 one in the Cambridge Museum, all in imperfect condition. The present 

 species is certainly longer than C. villosus, it is also covered with finer 

 hairs. The chief distinction however is found in the antennae. In the 

 present species, as mentioned above, the relative lengths of the joints 

 are 18, 54, 37, 39 ; while in C. villosus they are 24, 48, 39, 35. 



