( 599 ) 



sicut tibiarum medium et ajiex, et tarsorum articuli yocniidus et tertius, et apex 

 aiiiculornm piimi et ijnarti. 



Long. 19 mm., ro.-^tr. 7, elytr. 13, lat. 9. 



Allied to M.'wallftcei, hut at once distinguished from that species by the ro.strum, 

 the middle .sulcus of which runs from the front of the head to the tip of the rostrum, 

 gradually becoming broader anteriorly, and including a very short and sometimes 

 obsolete carina ; in M. loallncei the frontal sulcus stops soon before the eyes, where it 

 meets the median carina of the rostrum, which does not reach the apical triangular 

 impression ; the dor.so-lateral keels are very feeble in M. basalis, while in M. walUtcei 

 they are much more raised. The pubescence of the head, prothoi'ax, base of elytra, 

 and underside is cream colour in M, hasalis ; the blackish humeral and post- 

 humero-Iateral spots of the elytra and the two spots on the metasternum are arranged 

 in one oblique ray ; this ray, when viewed from the side, appears to be bordered behind 

 by a rather well-defined creamy band. The prosternal impression, which is simple in 

 M. ivallacei, is divided into two parts in M. Ixi.salis, the middle of the impression 

 being less deep than the sides. 



Hab. Borneo. 



11. Mecocerus allectus Pasc. 



There are two different looking fornis of this species in the Tring Museura 

 Specimens from Penang, which agree with Pascoe's type, have the elytra densely 

 pubescent yellowish ashy ; a spot near the scutellum, a larger one just behind the 

 middle, and some scattered smaller spots, are black. The prothorax bears a median mark 

 of the colour of the elytra, extending from the apex to the base, including anteriorlv 

 and [josteriorly a thin black median line ; that mark is bi- or trisinuate at each side, 

 the ante-basal sinus usually deepest. In the other form from Ruby Mines, Upper 

 Burma (W. Doherty), and Carin Cheba, Burma (900—1,100 m., L. Fea, Dec. 1888), the 

 pubescence is a little more greyish ; the elytra are black, and covered with a number 

 of yellowi.sh ashy spots arranged in rows ; the median mark of the pronotum is inter- 

 rupted before the middle ; the anterior i)art of that marking consists of two elongate, 

 anteriorly strongly convergent spots. I name this form Mecocerus allectus ah. 

 wncuhitus ab. nov. 



Two specimens from Victoria Point, Tenas.serim, stand between muculutiis and 

 typical (tllectus. 



The colour of the jnibescence of the rostrum is variable in both forms ; in Pascoe's 

 type-specimen, as well as in .some specimens of both variations in the Tring Museum, 

 the rostrum is lilack, the yellowish ashy pubescence of the front of the head suddenly 

 stopping before the eyes ; in other specimens this pubescence is extended farther down 

 the back of the rostrum, and in others again it reaches the tip of the latter. 



12. Mecocerus brevipennis sp. nov. 



<J ?. 31. (/(tzellri ab. hrunnescenti colore similis, sed structura et forma facile 

 distinguendus. Sulcus frontalis j)rofundus, in cpiarta jiarte basali rostri evanescens, 

 ubi basim carinae medianae rostri includens; hac carina subacuta, alta ; carinae 

 dorso-laterales rostri bene expressae. Prothorax granulatus, granulis in {S) densius 

 quam in(?)sitis; carina antebasali medio (cj) parum convexa, (?) recta. Elytra 

 lata, brevia, postice ad snturani parum im|iressa, punctato-striata, inters! it iis luteo- et 

 nigro-brunneo-maculatis. 



