82 Mr. C. O. Waterhouse's Monograph of the 



quadricostate, the 2nd and 4th costje more distinct, but 

 none reaching to the apex, the interstices with very 

 numerous transverse ridges (as in Eros minutus). Penul- 

 timate segment of the abdomen with a deep semicircular 

 emargination. (PI. II. fig. 91.) 

 Hub. — Australia. Brit. Mus. 



JVote. — This species differs much in appearance from 

 all the preceding, owing to the elytra being narrowed 

 towards the base, and the apex of each elytron is rounded. 



Trichalus, gen. no v. 



The following species are separated on account of their 

 having a deep lanceolate impression on the disk of the 

 thorax, and the costa of the elytra next the suture is 

 divided into three branches at the base, so that the other 

 oostee are not parallel to the suture. The rostrum is very 

 short. 



T.Jlavopictus, sp. n. (PL II. figs. 92—96.) 



Niger ; thorace ochraceo, utrinque bi-impresso, disco 

 areola lanceolata, in imo nigra, bene impresso; scutello 

 nigro ; elytris postice paulo ampliato, ochraceis, apice nigris, 

 septem-costatis, costis alternis minus elevatis, costa juxta 

 suturam basi trifida, interstitiis reticulato-punctatis ; coxis 

 femorumque basi flavis. 



Long. 3^ — 6^ lin. 



S . Antennae long and broad, 3rd to 10th joints gradu- 

 ally becoming shorter. Thorax reflexed at the sides; the 

 disk raised, and with a deep longitudinal fovea, joined to 

 the front margin by a carina. The penultimate segment 

 of the abdomen is not deeply notched in the middle. 



¥ . Antennge less strongly dentate. Thorax straighter 

 at the sides. Elytra a little more parallel. Abdomen 

 simple. 



Hub. — Port Bowen. Brit. Mus. 



T. discoideus, Er. (PI. II. figs. 106—108.) 



Porrostoma discoideus, Er., Archiv. f. Naturg. 1842, p. 145. 



" Niger, thorace 3-arcato, elytris rufis, disco nigri- 

 cantibus, tricostatis, interstitiis bifariam cancellatis." 

 Long. 4|— 5| lin. 



