234 PERCY SLADEN TRUST EXPEDITION 



" magis crassa, elytris piceis, sat fortiter punctatis, sutura valde elevata, utrinque costis 

 2 sat elevatis," and states that it differs much from the $, and has the ckxb of the antenna 

 composed of 5 lamellae. 



There is slight variation in size etc. in the series. Length varies from 9 — 11 mm. 

 Some specimens are shining black, others are more bronze-coloured, in a few the elytra are 

 pitchy-ferruginous : all are strongly shining with a brassy lustre. I have measured the 

 wings and elytra in 3 specimens and found the length of the former averaging about twice 

 that of the latter. 



Loc. Seychelles. Mah^ : various localities, mostly about 1000 feet, X. 1908 — 

 II. 1909. I first met with this species on Oct. 17th, 1908, at an elevation of about 

 1000 ft., while descending the road from Capucin to Port Victoria ; over a large part of 

 the way specimens were flying rapidly, low over the road, occasionally settling on the 

 scented lemon-grass planted by the wayside ; the afternoon was dull and extremely damp 

 after much heavy rain. Some of the specimens were obtained earlier, 1905 — 1907 

 (Thomasset, Gardiner, de Gaye). The species was previously taken in Mahe by Alluaud 

 and P. Wright. According to Linell (/. c.) it was found in Glorioso Island by Abbott. 



19. Perissosoma grande, sTp. nov. 



$. Piceo-ferrugineum, senescens, nitidum ; P. CBnescente multo majus, latius, minus 

 depressum ; capite crebrius punctato, antice minus impresso, vertice unituberculato, clypeo 

 antice magis rotundato ; antennarum clavis 3-lamellatis ; thorace subtilius punctato, 

 lateribus medio magis rotundatis ; elytris fortius punctatis. Long. corp. llf — 13 mm. 



Distinguishable at once from P. cenescens $ by its much greater size, much less 

 depressed form, and greater proportionate breadth ; by the clubs of the antennae being 

 composed of 3 instead of 4 lamellae ; by the head being much less strongly impressed, with 

 its front margin more rounded, and by its possessing a small but quite distinct tubercle on 

 the vertex. 



The colour is brownish-bronze, as opposed to the blackish-bronze of P. cenescens. 

 Clypeus densely punctate, its punctuation rather subrugose ; the line of division between 

 it and the frons distinct. Rest of the head fairly strongly punctate, the punctuation 

 becoming finer on the posterior part. Thorax very finely punctured, its sides more 

 rounded and less nearly subangulate in the middle than in P. csnescens. Elytra propor- 

 tionately shorter than in P. cenescens : as in that species, each has a distinct stria near 

 the suture, the space between it and the suture being impunctate ; the remainder of the 

 elytron is rather irregularly striate-punctate, with the interstices not very closely 

 punctate ; the punctures are all very distinct, and larger and stronger than in P. cenescens. 

 Wing nearly twice as long as the elytron. Pygidium more closely and finely punctured 

 than in the preceding species. 



I have seen 3 specimens, all males. Two were obtained by our expedition, the third 

 was obtained earlier, by Mr R. P. Dupont, and is in the British Museum. My two 

 specimens differ greatly in size, but agree in all characters that separate P. grande from 

 P. cenescens. Unfortunately only one specimen has the antennae intact, but in that one 

 they are quite perfect. I at first thought this must be the $ of P. tenuitarse Fairmaire ; 



