248 



PACH YTERIA NIEUWEN HUISII. 



NOTE XXIII. 

 PACHYTERIA NIEUWENHUISII, N. SP. 



DESCRIBED BY 



C. RITSEMA Cz. 



Close to and much resembling P. lugubris Rits. from 

 Nias (N. L. M. vol. XIV, 1892, p. 215), but smaller 

 (measuring 26 mm. in length) and more vividly colored. 



Above opaque, the smaller basal half of the elytra, how- 

 ever, shining. — Head dark blue with green tinges, red in 

 the middle beneath. 1 st , 2 nd and basal half of 3 rd antennal 

 joint dark blue, apical half of 3 rd joint and the 4 th — 7 th 

 joints yellow, the 7 th spotted with black at the apex above, 

 the subsequent joints black. — Prothorax red, front- and 

 basal margins dark blue, the latter surrounding the coxae 

 and invading the intercoxal part. Without any trace of spine 

 or tubercle laterally; the disk flat, strongly punctured, sharply 

 separated from the sides as if it were a piece led in ; the 

 sides and undersurface finely, evenly and very densely punc- 

 tured, forming a lustreless surface. Scutellum dark blue, 

 with black pubescence. — Elytra metallic green, the smaller 

 basal half bald, shining, rather densely punctured, the larger 

 apical half opaque, very finely aud densely punctured and 

 covered with a short aud very dense black pubescence; at 

 one third of its length this black portion is crossed by a 

 very narrow transverse band of a pale yellowish pubescence, 

 touching neither the suture nor the lateral margins, and a 

 similar though still more delicate pubescence is present on 

 the shining green basal half just before the black pube- 

 scence. — Meso- and metasternum and the abdomen steel- 

 blue, the latter more greenish towards the apex and covered 

 by a silky white pile, especially on the hindborders. The 

 legs steel-blue, the femora strongly punctured, the tibiae 

 more finely. The 5 th ventral segment broadly and deeply 

 emarginate, the 6 th broadly but less deeply. 



Hab. Borneo: Mahakkam river. — The described male- 

 specimen has been presented to the Leyden Museum by 

 Prof. A. W. Nieuwenhuis, to whom 1 dedicate the species. 



Leyden Museum, February 1909. 



Notes frotn the Leyden Museum, "Vol. XXX. 



