298 



BUTELUfJE. 



present I prefer, instead of making yet more genera, to retain all 

 these forms in the great genus Adoretus. 



The very numerous species of Adoretus are almost all dull- 

 coloured inconspicuous insects. With few exceptions they appear 

 to be nocturnal in their habits, emerging at night to feed upon 

 foliage. Several of the common Indian species have been found 

 in considerable numbers feeding upon roses, cannas, vines, man- 

 goes, and other cultivated plants, while their larvae have been 

 found in the soil at the roots of these and other plants, and the 

 adults also conceal themselves beneath the surface soil during 

 the day. They are therefore not often seen, in spite of their 

 abundance, except when attracted into houses by light. 



Key to the Species. 



1 (6) Clypeus with several lobes in front. 



2 (3) Hind legs very short and thick ; 



elytral clothing close and speckled . 



3 (2) Hind legs moderately loiiff ; elytral 



clothing thin and uniform. 



4 (5) Elytral setae in longitudinal lines 



5 (4) Elytral setae scattered 



6 (1) Clypeus not lobed. 



7 (8) Clypeus deeply excised in front ($ 



unknown) 



8 (7) Clypeal margin simply rounded (very 



feebly sinuated in a few males only). 



9 (12) Antennae 9-jointed. 



10 (11) Dark, not striped ; closely hairy 



11 (10) Pale, with dark stripes'; very thinly 



setose 



12 (9) Antennas 10-jointed. 



13 (20) Scutellum very densely clothed with 



white setae. 



14 (15) Clothing dense, scaly at the sides 



15 (14) Clothing not dense or scaly. 



16 (19) Elytral setae not forming clusters. 



17 (18) Sette short above 



18 (17) Seta? long above 



19 (16) Elytral setaa forming clusters 



20 (13) Scutellum not more densely setose 



than elytra. 



21 (32) Elytra having small alternating patches 



of more densely and more sparsely 

 aggregated setts. 



22 (31) Apical calli of the elytra tufted. 



23 (24) Outer edge of the front tibia serrated 



above the teeth (larger species) .... 



24 (23) Outer edge of the front tibia not 



serrated above (small species). 



25 (26) Pygidium with two very dense and 



prominent hair-tufts 



26 (25) Pygidium without paired hair-tufts. 



27 (30) Pronotum not very short. 



28 (29) Clypeus rather large 



29 (28) Clypeus rather small 



[p. 302. 

 coronatus, Burm., 



[p. 303. 



senesetosus, sp. n., 

 Ivbiceps, sp. n., p. 303. 



excisus, Oh., p. 304. 



minutus, Brens., p. 305. 

 limbatus, El., p. 306. 



ernrinetis, Arr., p. 306. 



leo, Arr., p. 307. 

 duplicates, sp. n , p. 308. 

 mavis, Arr., p. 309. 



[p. 310. 

 bombinator, Burm., 



bicaudatus, Arr., p. 310. 



[p. 311. 



compres&us, Wied., 

 vitticauda, Arr., p. 312. 



