590 SEEEICOENIA. 



5. ArtematopilS rufescens. (Tab. XXVI. figg. 2, tf ; 2 a, antenna ; 2 £, 

 prosternum ; 2 <?, genitalia ; 3, antenna, $ .) 



cJ . Oblong-oval, rather narrow, convex, shining ; piceous, fusco-ferruginons, or rufo-testaceous, the prothorax 

 sometimes darker than the elytra, the body beneath and the antennae rufo-eastaneous or ferruginous, the 

 legs obscure testaceous ; rather sparsely clothed with yellowish-cinereous pubescence, the upper surface 

 with long erect hairs intermixed. Head thickly, rather coarsely punctate, the punctuation becoming 

 sparser on the vertex ; antennae slender, longer than the body, joints 2 and 3 very small, subequal, 4 about 

 five times the length of 3, the joints 4-10 concave without and dilated at the apex within, all clothed 

 with long fine hairs. Prothorax strongly transverse, convex, gradually, arcuately narrowing from the 

 base forwards, the apex feebly emarginate on either side ; the surface sparsely, moderately finely punctate, 

 usually with a narrow smooth space down the middle. Scutellum obsoletely carinate in some specimens. 

 Elytra moderately long, narrowing from the middle, conjointly rounded at the apex ; punctate-striate, the 

 striae very coarsely punctured and deep at the sides, and more finely punctured and shallow on the disc ; 

 the interstices convex, natter on the disc, very finely uniseriate-punctate, and here and there transversely 

 wrinkled. Beneath very sparsely, finely punctate. 



2 . Antennae about reaching the middle of the elytra, joint 3 considerably longer than 2. 

 Length 4g-6|, breadth 2-|— 3| millim. 



Hah. Panama, Bugaba, Volcan de Chiriqui, Caldera, David (Champion). 



Found in plenty in Chiriqui. Smaller, narrower, and usually of a more ferruginous 

 colour than A. puncticollis, and differing constantly from that species in the sparsely 

 punctured very shining thorax, the punctures also being finer. The females are 

 generally larger than the males. 



6. Artematopus costaricensis. 



5 . Oblong-elliptic, convex, shining ; piceous, the head in great part ferruginous, the elytra obscure reddish- 

 brown, with the suture to beyond the middle very broadly and indeterminately, and the sides also, 

 piceous ; the antennae, palpi, and legs ferruginous, the body beneath castaneous ; sparsely clothed with 

 yellowish-cinereous pubescence, the upper surface also with long erect hairs. Head closely, coarsely 

 punctate ; antennas very slender, about reaching the basal third of the elytra, joint 3 nearly twice as long 

 as 2, and half the length of 4, the joints from the fourth concave without and somewhat rounded within, 

 each slightly widened outwards. Prothorax strongly transverse, moderately convex, rapidly and somewhat 

 arcuately narrowing from the base forwards, the apex rather deeply emarginate on either side ; the surface 

 thickly, rather coarsely punctate, the base feebly emarginate in the centre. Elytra moderately long, 

 narrowing from about the middle, obtuse at the apex ; punctate-striate, the striae coarsely punctured and 

 rather deep at the sides, and finely punctured and shallow near the suture ; the interstices convex at the 

 sides, nearly flat on the disc, minutely uniseriate-punctate, and also transversely wrinkled. 



Length 4|, breadth 2| millim. 



Rah. Costa Rica, Cache (Rogers). 



One specimen. This insect has shorter and more slender antennae than the females 

 of the allied forms. The thorax is less transverse and more narrowed in front than in 

 A. rufescens, and is also more closely punctured. 



7. Artematopus rotundicollis. 



<S . Oblong- or elongate-oval, convex, shining; piceous or reddish-brown, the metasternum usually darker than 

 the abdomen, the antennae piceous or ferruginous, the legs ferruginous or obscure testaceous, the tibia? 



