664 Longicornia Malay ana. 



Out of ten specimens, exclusive of the one in the 

 British Museum, I was at first inclined to consider 

 four as representatives of so many distinct species, 

 but after a careful examination, I can find nothing 

 positive in any of them. They all difier among them- 

 selves, but the difierences are those of sex or of degree, 

 not even of locality, and are apparently individual rather 

 than specific. The greatest discrepancies are in the 

 breadth of the scutellum, the reticulation (or its entire 

 absence) of the elytra, and the denticulation of the scape 

 and of the pro thorax. 



Xixuthrus microcerus. 



Macrotoma microcera, White, Cat. Long. Br. Mus. p. 40. 



X. brunneus, griseo-pubescens ; elytris singulis quin- 



que-costatis. 

 Hah. — Key; Morty; My sol; Bouru; Amboyna; Bat- 

 chian ; Dorey ; Menado ; Ternate (and Java) . 



Reddish-brown, covered with a short thick grayish or 

 yellowish pubescence ; head and prothorax scarcely punc- 

 tured, the latter with eight or ten slender, short or elon- 

 gate, spines on each side ; scutellum scutiform, more or 

 less transverse ; elytra with numerous confluent impressed 

 punctures, each elytron with five costae, generally reticu- 

 late near the apex, the first and second costae sometimes 

 connected by raised lines ; body beneath slightly pubes- 

 cent ; legs glossy reddish-brown ; antennae with the scape 

 darker than the other joints. 



Length 24-45 lines. 



Mr. White mentions only four costae on each elytron, 

 but there is a fifth, close to, but quite distinct from the 

 raised line of the suture. 



Dysiatus. 



Caput angustatum, inter oculos sulcatum, fronte trian- 

 gulariter emarginata; mandibulce crassas, subverti- 

 cales, productge, rectge, apice abrupte arcuatas, intus 

 bidentatae. Labium divaricatum. Antennce graciles, 

 dimidio corporis longiores; scapo subelongato, de- 

 presso, scabro, intus denticulate ; articulo tertio 

 multo breviore ; 4, 5 et 6 tertio paulo brevioribus ; 



