70 Mr. Charles J. Gahan's Revision of 



$ . Antennae a little shorter than the body. Middle tibiae slightly 

 incurved towards the apex. Last ventral segment impressed with a 

 median line which widens into a shallow pit near the apex. 



Hob. Shanghai. Type ( $ ) in coll. Oberthtir. $ $ and 

 ? ? in Brit. Mus. 



2. Plaxomicrus vcntralis, sp. n. 



£ . Very similar in form and structure to P. ellijrticus, Thorn?., 

 and closely resembling it also in coloration, but distinguishable as 

 follows: Elytra entirely violaceous; first four abdominal segments 

 black ; tarsi, apices of the tibia?, and the whole outer face of the 

 four front tibiae, black. Head rather closely punctulate in front. 

 Prothorax somewhat more thickly punctured than in P. ellipticus, 

 especially on the centro-notal tubercle. 



Long. 13 mm.; lat. (ad basin elytroruin), 4*25 mm.; lat. max., 6 mm. 



Rob. Upper Tonkin, N.W. of Bao Lac (Dr. Battarel — in 

 coll. Obertblir). 



3. Plaxomicrus loins, sp. n. 



^ . Yellowish-testaceous and nitid ; with the elytra almost entirely 

 violaceous, a small spot only at the extreme base of each adjoining 

 the scutellum being, like the latter, testaceous ; the last seven joints 

 of the antennae dark brown ; the tarsi, the apices and almost the 

 whole of the outer face of the tibiae, black. Head feebly and 

 sparsely punctured, impressed with a median line. Prothorax 

 distinctly, but rather sparingly punctured ; the anterior transverse 

 groove somewhat shallower and less distinct in the middle. Elytra 

 strongly dilated behind, attaining their greatest breadth at about 

 one-third from the apex ; strongly but sparsely punctured on the 

 anterior half, finely and sparsely punctulate over their whole 

 surface ; furnished above with longer and shorter black setae, and 

 along the lateral margins with a fringe of short black setae. Under- 

 side sparsely clothed with tawny setae. Antennae reaching to the 

 posterior third of the elytra. Middle tibiae incurved towards 

 the apex. 



Long. 12-13 mm. ; Lit. (ad basin elytroruin), 5 mm.; lat. max., 

 7*25 mm. 



Rah. Bhutan, Maria Basil and Pedong. Type ($) in 

 coll. Obertlillr. 



This species is very similar in coloration to P. ellipticus ) 

 but has a different form, the head, prothorax, and base of 

 the elytra being relatively broader than in that species, 



