LTTDIUS. 5U5 



9. Ludius depresSUS. (Tab. XXII. figg. 9, 6 ; 9 a, antenna.) 



Very elongate, narrow, depressed, shining ; brown, the antennae and legs brownish-testaceous ; somewhat 

 thickly clothed with short, decumbent, yellowish-cinereous pubescence. Head closely, rather coarsely 

 punctate ; antennas slender, more than half the length of the body, joint 3 a little longer than 2, the two 

 together shorter than 4, 4-11 moderately serrate, 11 appendiculate. Prothorax slightly broader than 

 long, narrowed in front, sinuate at the sides behind, somewhat abruptly declivous towards the base, the 

 marginal carina visible from above to near the apex ; the hind angles long and narrow, divergent, carinate ; 

 the surface coarsely, closely punctate, the punctuation becoming denser and umbilicate towards the sides, 

 obsoletely canaliculate along the median third of the disc. Elytra rather more than three and one-half 

 times the length of, and fully as wide as, the prothorax, parallel to the middle, and gradually narrowing 

 thence to the apex, the apices separately rounded ; very finely punctate-striate, the interstices flat and 

 thickly, rugulosely punctate, subgranulate at the base. Beneath closely, finely punctate; prosternal 

 process very gradually declivous behind the coxae ; intercoxal portion of the mesosternum depressed, 

 gradually declivous, V-shaped; posterior coxal plates broadly widened in their inner third, rounded 

 opposite the insertion of the femora. 



Length 13, breadth 3j millim. ( d •) 



Hab. Costa Rica, Volcan de Irazu 6000 feet (Rogers). 



One specimen. The depressed, subparallel shape of this insect gives it a very- 

 different facies from the typical Ludii, but it possesses all the structural characters 

 of the genus. Dr. Candeze has examined the specimen, and he suggests an affinity 

 with Probothrium ; it cannot, however, be included in that genus on account of the 

 depressed mesosternum. 



10. LudillS phySOrhinus. (Tab. XXII. fig. 10, prosternal process.) 

 Probothrium physorhinus, Cand. Monogr. Elat. iv. p. 290 \ 



Hab. Mexico, Cordova (Salle 1 ); Guatemala, Zapote (Champion); Nicaragua, 

 Chontales (Belt) ; Panama, Bugaba, Volcan de Chiriqui (Champion). 



I have seen eight specimens of this species, including the type (6); four of these, 

 including both sexes, are from Chiriqui. The females have the thorax broader than 

 the elytra, in this respect approaching the Amazonian P. amplicollis, Cand. The 

 intercoxal portion of the mesosternum is much less abruptly declivous than in the 

 typical species of Probothrium, and the insect seems to me to be best placed in Ludius. 

 The prosternal process is declivous behind the coxae and concave between them. The 

 punctures of the elytral striae are distinct from those of the interstices — coarse in some 

 specimens, and fine in others (irrespective of sex), the strise themselves being very 

 shallow. The third joint of the antenna? is a little longer than the second. 



1/ 11. LudiuS SetOSUS. (Tab. XXII. figg. 11, 6 ; 11 a, antenna; 115, pro- 



sternal process*.) 



Aphanobius setosus, Germ. Zeitschr. fur Ent. v. p. 183 l . 

 Probothrium setosum, Cand. Monogr. Elat. iv. p. 294 2 . 

 Ludius innoxius, Chevr. in coll. Salle (? Aphanobius innowius, Dej. Cat. 3rd edit. p. 104) 3 . 



* The number 11 b has been accidentally omitted in the lettering of the Plate. 



biol. centk.-amee., Coleopt., Vol. III. Pt. 1, May 1896. 3 T 



