APHTHON A. 



367 



paratively thicker antennae, 

 first segment of the tarsi. 

 Range. World-wide. 



and by the slight dilatation of the 



Key to the Species, 

 ]. Colour of upper side yellow-brown .. 2. 



Colour of upper side not yellow-brown. 5. 

 .2. Abdomen and underside black ; apices 

 of the femora not darker than their 



basal part A. atriventris, sp. n., p. 368. 



No such combination of colours 3. 



3. Scutellum black 4. 



Scutellum not black A. kanaraensis, Jac, p. 368. 



4. All the femora black ; suture narrowly 



piceous . . A. nilgiriensis, Jac. ; p. 369. 



Only the posterior femora black or 



deeply piceous ; suture not piceous [p. 370. 



at all . A. nigrilabris, Duviv., 



•5. Pronotum and elytra concolorous .... 7. 

 Pronotum and elytra not concolorous. . 6. 



6. Larger insects (3£ mm. long) ; pro- 



notum reddish-brown ; shoulders not 



prominently convex A. hugeli, Jac, p. 371. 



Smaller insects (2 mm. long) ; pronotum 

 yellow-brown ; shoulders prominently 



convex A. lewisi, Jac, p. 372. 



7. Colourof at least the upper side metallic 8. 

 Colour non-metallic 11. 



8. Entirely metallic bright blue ; antennae, 



tibiae and tarsi black A. azurea, Jac, p. 372. 



No such combination of colours 9. 



9. Upper side metallic greenish or bluish, 



underside piceous, antennae and legs 



light brown A. indica, Jac, p. 373. 



No such combination of colours 10. 



10. Upper side metallic dark blue, under- 



side bluish-black A. imdrewesi, Jac, p. 374. 



11. Insects of a larger build (2i mm. long) ; 



obscure piceous, generally the third, 

 fourth, and fifth segments of the 

 antennae alternately bright brown and 



blackish A. proxima, Jac, p. 374. 



Smaller insects (li~H mm. long), 

 without the characteristic antennal 

 colouring: described above 12. 



12. Body oblong (H mm. long), the elytra 



not widened at the middle ; shining 



black, tarsi not brown A. vicina, Jac, p. 375. 



Body ovate Hi mm. long), the elytra 

 distinctly widened at the middle ; 



obscure piceous, tarsi brown A. ceylonensis, Jac, p. 375. 



Three of Motschulsky's species are added on p. 376, but are 

 not included in the above key. 



