24 LTCIDiB. 



Black, or slightly fuscous. Elytra only slightly wider at the apex ; 

 each elytron with four costse, the interstices divided into square or 

 slightly transverse spaces by transverse nervures. The fourth to 

 tenth joints of the antennae in the male emit from the base a some- 

 what long, slender, compressed branch. The female has the antennae 

 strongly dentate, and the thorax is strongly constricted in the 

 middle, which causes the posterior angles to appear much more 

 diverging. 



EURRHACUS. 



Eostrum none. Apical joint of the maxiUary palpi elongate, 

 eultriform. Antenna? long, the third to tenth joints each with a 

 long, compressed branch springing from the base of the joint. Tho- 

 rax with a mesial carina, which is doubled in the middle. Elytra 

 pubescent, parallel ; each elytron with nine costae, only four distinct, 

 the interstices with a single line of punctures. 



The eultriform apical joint of the palpi and the flabellate antennae 

 at once separate this from Emplectus, after which it should be placed. 



Eurrhacus tristis. 



(Plate VI. fig. 5.) 



Lycus (gen. 14) tristis, Waterh., Trans. Ent. Sue, 1878, pp. 99, 106. 



Niger, depressus, opacus, subtiliter pubescens ; antennarum arti- 

 culis duobus axiicalibus flavis ; thorace flavo, vitta mediana nigra, 

 antice rotundato, angulis posticis acutis; elytris subparallelis, flavis, 

 sutura usque ad medium apiceque nigris. Long. 5 lin. 



Hah. Cuenga, Ecuador. 



Dull black, the base of the palpi and base of the legs testaceoiis. 

 Thorax with the margins finely reflexed, the disk with a mesial 

 carina which divides and encloses a narrow elongate areolet in the 

 middle, and then again becomes a single carina just before the pos- 

 terior margin. Each elytron has nine costae, the second, fourth, 

 sixth, and eighth only distinct, the others are very fine ; the punc- 

 tures in the lines are rather small, slightly transverse. 



LYPONIA. 



Waterh., Trans. Ent. Soc, 1878, p. 99. 



Bostrum none. Teguments thin. Antennae with long stout 

 branches to the joints. Thorax subquadrate, with a mesial im- 

 pressed line on the disk. Each elytron has nine costae, the alternate 

 ones more conspicuous, the first, second, and third not reaching the 

 apex, the fifth and seventh joining the sixth some distance from the 

 apex ; the interstices with transverse nervures. 



