's RIJKS MUSEUM VAN NATUURLIJKE HISTORIE — LEIDEN. 97 



IX. A VERY REMARKABLE LONGICORN FROM SUMATRA 



BY R. VAN EECKE (WITH PLATE II, fig. 1 and 2). 



Some years ago, taking care of the entomological material, collected 

 by Mr. Edw. Jacobson, I saw among the Coleoptera a very beautiful 

 Longicorn, unknown to Messrs Ritsema and Yeth. After the dead of Dr. 

 H. J. Yeth, all his Coleoptera, among which also the material of Mr. 

 Jacobson, turned back to the Leiden Museum of Natural History. Imme- 

 diately I looked for the beautiful Longicorn, but I could find neither 

 the specimen nor the figures, which I painted in water-colours in behalf 

 of Dr. Yeth. Those figures had been sent to several foreign specialists, 

 our unique specimen being probably a representative of a new genus 

 and species. After a year I found the Longicorn (Lamüd) and now I 

 will give without delay the following description, abstaining of a comparison 

 with any one of the hitherto described genera and species, as this species 

 is very aberrant. So the relationship to other genera provisionally must 

 remain a puzzle. 



Capitocrassus castaneus, nov. gen., nov. spec. 



Antennae: 12-jointed, reaching to the end of abdomen, covered by 

 a , grayish redbrown felt, darker brown to the end of antennae. Under- 

 side provided by short hairs. The scape of the antennae 5,5 m.m. long 

 and 1,7 m.m. broad, without the short hairs of the other joints. The 

 second joint very small; the third joint 7,5 m.m. long and narrower 

 than the scape; the 4th joint 5 m.m. long; the 5th — nth slightly 

 decreasing in length, and the apical joint, which is pointed at the tip, 

 very short and grown together with the 11th joint. Through this the 

 antennae seem to be 11-jointed. 



Head: very large; seen frontal ly, longer than broad with rounded 

 occiput and parallel cheeks. Eyes, situated round the protruding qua- 

 drate bases of antennae, not very large. A very distinct median suture 

 divides occiput and frons into two halves. Labrum short, quadrate and 

 hairy; mandibles not very large, curved, sharp at the pure black ends. 

 Frons and oral part of occiput reddish, grayish brown, then a rose band 

 over occiput and cheeks. The distal margin of occiput dorsally bordered 

 with black. 



Prothorax: large, rounded dorsally, with two large lateral tuber- 

 cles, upon which a small black spine; two small pits in the centre of 

 pronotum. As to the colour, it is that of the felt, which covers the 



