1899,] PHYXOVHAGOUS COLEOPTEHA. OE AlHICA. 371 



punctate ; elytra scarcely perceptibly punctured and obsoletely 

 longitudinally sulcate. 



Length 8 milliin. 



Of elongate, somewhat depressed shape, entirely testai-eous ; the 

 head very long, transversely grooved between the antennae, the 

 vertex impuuetate, the frontal elevations trigonate ; the elypeus 

 subquadrate, broad, depressed at each side, the middle with a 

 longitudinal ridge ; eyes rather small, ovate ; the auteunse slender, 

 black, the lower two joints liavous, basal joint very elongate and 

 slender, the second very small, the following joints nearly as 

 long as the first one, the last three joints broken off ; thorax 

 scarcely broader than long, the sides rather strongly constricted 

 at the base, rounded before the middle, the angles acute, the 

 surface with a shallow depression at each side, entirely im- 

 punctate ; elytra wider than the thorax at the base, the surface 

 scarcely perceptibly punctured, somewhat uneven, with traces of 

 longitudinal sulci, their epipleurae very broad, concave, and continued 

 to the apex ; legs elongate, the tibiae unarmed ; the anterior coxal 

 cavities closed. 



Hah. Cameroous {Conrad). 



The elongate head of this species agrees far more with the 

 typical form P. apicalis Baly, from Sumatra, than any other of the 

 African species at present placed in Platyxantha. I received a 

 single specimen from Dr. Kraatz. 



Plattxaj^tha lukunguensis, sp. n. 



Narrow and elongate, metallic blue, the antennae and legs black, 

 head and thorax purplish, impunctate; thorax with a deep transverse 

 depression ; elytra finely and closely punctursd. 



Length 5 millim. 



Head purplish blue, impunctate, the frontal tubercles strouglv 

 raised, transverse ; the elypeus derlexed anteriorly, strongly raised 

 in shape of an acute triangular ridge ; labrmn and palpi black ; 

 antennae longer than the body, very slender, black, all the joints 

 finely pubescent, the fifth and the following two joints curved 

 each joint articulated at the extreme outer angle of the precedino- 

 one ; thorax subquadrate, scarcely one-half broiider than long, the 

 sides nearly straight, the disc impunctate, metallic bright purplish, 

 M'ith a deep transverse sulcation at the middle ; scutellum broad, 

 impunctate ; elytra narrow and parallel, metallic blue, finely and 

 closely punctured, the interstices somewhat wrinkled ; underside 

 and legs blue, the latter long and slender, pubescent, the tibiae un- 

 armed, the first joint of the posterior tarsi longer than the following 

 joints together. 



Hab. Lukungu, Congo (C. Haas). Belgian Museum collection 

 and my own. 



A narrowly elongate species with all the characters of the genus, 

 distinguished by the long and slander antennae and the structure 

 of the intermediate joints, probably peculiar to the male sex 

 only. 



