( (i08 ) 



l)lanatis, caeteris levissime cOnvexis, prinio antice latiore scrie hievi piinctoriim 

 instructo ; griseo-pubeseentia, lufo-niaculata : macula Imsali mediana subovali, plaga 

 irregulari lateral! posthiimerali obliqua elytroruin medium ac intus striam secundam 

 attingente, triangulo maiginali postmediano supra segmenta duo prima abdominalia, 

 macula obliqua anteapicali sub-bipartita intus sinuata, maculi.-; duabus suturalibus 

 una indistincta antemediana, secunda elongat^a postmediana. 



Pygidium medio fuscum, apice lato rotundatum. Prosternum medio vix, 

 latrorsum, ut mesosternum antice in parte profundata, sensim punctatum. Metasternum 

 et abdomen laevia. Femora medio parum infuscata. 



Ivong. 1(H mm., rostr. oi, elytr. 7, lat. 5. 



Hah. Amboina. 



Note. — Though D. Shaqi (Tr Ent. Soc. Loncl., 1891, p. 301) points out Acorynus 

 Schonh. a.i\d Litocenis Schonh. to be s^nionymous witli Tropicleres Schonh., I treat 

 these three genera here as distinct, since the typical species of them [^Acorynus 

 sulcirostris Schonh., TAfocerus histrio Schonh., and Tropideres alhirostris (Fabr.)], 

 and a number of allied forms, can be generically distinguished as follows : — 



1. Acm'ynus. — Rostrum rather thick ; antennal grooves placed with their anterior 

 portion into a dor.so-lateral impression of the rostrum, which extends almost to the 

 apical margin, and is plainly visible from above — thus the antennal grojves appear 

 to be partly dorsal themselves ; antennae .slender, penultimate joint short ; tarsi long 

 in both sexes ; anal segment of abdomen with a kind of carina in the middle in the 

 male sex. 



2. Litocenia. — Rostrum more depres.^ed ; antennal grooves entirely lateral; tenth 

 joint of the slender antennae scarcely or only a little shorter than the ninth and 

 eleventh; all joints except the basal ones compressed and rather broad in the male; 

 tarsi elongate in both sexes ; abdomen simple. 



3. Troinderes. — Rostrum as in Litocerus ; antennal grooves infero-lateral ; three 

 last joints of the antennae, which are short in both .sexes, forming a rather tliick club ; 

 tarsi short in Vioth sexes ; abdomen simple. 



After ha\aug separated the species which fit into the three genera thus defined, 

 there still remains a large number of species in our collection which do not agree exactly 

 with any of these genera, and for which, in my opinion, rather many genera will have to 

 be erected ; for the present I prefer to leave most of the species under the generic 

 terms Acofynus and Litocerus, chiefly owing to the large number of species in 

 the Museum which I cannot yet describe. All the species with the tenth antennal 

 joint short will be foimd here under Acmv/mis, those with that joint long under 

 Litocerus. Of Tropideres, under which genus stand the most bet erogene forms, I 

 describe only one species, being unable to identify with certainty for the jnesent so 

 7nanv of the species of this genus. 



Litocerus Schonh. 



I. SPECIES AKRICAXAE. 



2(1. Litocerus mocquerysi sp. nov. 



(J?. A. niger, imbc luteof'ulva, albo- ac fusco-variegatus. Rostrum prothorace 

 tertia parte brexius, rugato-punctatum ; dorso medio carinatum, carina intra antennas 

 interrupta, parte ajjicali obsoleta abbreviata, ante oculos sulcatum, sulco versus 

 apicem evaneseente; lateribus simplex; sulcis anteunarum fere ut in Acm'yno 



