On some new AmpMpodous Crustacea. 443 



There is nothing remarkable about the rest of the legs, ex- 

 cept that thej are slightly scabrous. 



Abdomen slender, tiliform, wider than the pro thorax ; the 

 sapraanal plate short, transverse, fully twice as broad as long, 

 truncate-rounded at the free end ; terminal cleft portion of 

 the infragenital plate strongly and suddenly compressed, and 

 projecting wholly beyond the abdomen, but hardly reaching the 

 extremities of the cerci] these are oval, broadly foliaceous, 

 scarcely thrice as long as broad, indistinctly articulated at the 

 base, where they are formed of a number of very short joints 

 all ankylosed together, but showing three tolerably distinct 

 large apical joints, the terminal one of which is obliquely trun- 

 cate, so that the upper margin of the appendage appears 

 strongly convex, while the lower is almost straight. 



Colour of the living insect, with the wings closed, pale luteous 

 grey ; the tegmina slightly yellower than the body. 



Male unknown. 



Total length 50 millims. ; length of prothorax 14^, of which 

 the neck is 41, width of prothorax at supracoxal dilatation 2 ; 

 length of abdomen 26, width of abdomen 2| ; length of teg- 

 mina 23^, width of tegmina 5 j length of wings 22|, of fore 

 coxa 7|, of fore femur 9. 



Hah. A single specimen of this beautiful little insect was 

 captured by my wife on a dinner-table in Calcutta. It flew 

 in at the window, attracted by the bright lights. Westwood's 

 H. tenuijpes is said to have come from Senegal. 



XLV. — On some new and little-known AmpMpodous Crustacea. 

 By the Eev. T. E. K. Stebbing, M.A. 



[Plates XIX. & XX.] 



AmpMlochas concinna^ n. sp. PI. XIX. figs. 1, la, 1 h. 



Ampliiloclius concinna was dredged in or near Torbay in 

 April 1876. 



The antenna are subequal in length ; the superior the more 

 robust, with the first joint longer than the other two and the 

 flagellum as long as the peduncle ; several articulations of the 

 flagellum are furnished witli long hairs. In the lower antennge 

 the penultimate joint is the longest ; the flagellum has only 

 three articulations, together equalling in length the last joint 

 of the peduncle. The head has a depressed rostrum ; each 

 side also is produced into a sharp point between the upper and 



30* 



