210 



Mentum (PI. VIII., tig. G, j) permaguum, suboblongum, ad basim latissimum, costis 

 latis, lateralibus, firmatum, aiiKulis omnibus lotundatis. 



Labium (Pi. VIII., fig. ("», k) breve, transverse obionguui, costis latis, lateralibus, 

 firmatum. 



Lhujua (PI. VIII., tig. 6, 1) sat magna, flabeiiiformis, margine anteriori ciliata, 

 palpis labialibus pariter longa 



Pronotum \nb\b, tran.sversvnn, ad basim latissimum. 



SciitcUiim L'longutum, triaugulare. 



Elytra integra. 



Ahe iPl. VIII., tig. 9) amplissima?. baud podunculativ, nervis validis firmatse, nervo 

 primario inferiori ad mediam alam fortiter incurvato et dehinc late dilatato ; 

 margine inferiori pilis setiformibus ciliata. 



Abdoiiun segmentis septem compositura, sex basalibus coriaceis, fere paribus; 

 septimo precedent! longiori, subcorneo. In .S'. acaroide, et fortasse in aiiis, 

 abdomen depressionem jirofundam, late conicam, exhibet e segmento quarto 

 exortam, usque ad marginem extremam septimi extensam. 



J'rothoni.r (PI. \'1II., tig. 2, a) brevis : prostcnio carinato, carina postice dilatata ; 

 epixtiriiis consiiicuis, trigonalil)us ; ejiimeris parvis, receptacula coxarum 

 partim cingentibus ; receptaculis coxarum magnis, postice partim apertis. 



PectKs iiusosterno (PI. VIII., tig. 2, d) perbrevi; ejuslentin longis, angustis ; epinuTig 

 parvis, angustis, ad coxarum receptacula extensis ; receptaculis coxarum 

 magnis, elongato-ovalibus, ad extremum exteriorem abrupte emargiuatis, inter 

 se late distantes. 

 metnsteruo (PI. VIII., fig. 2, g) permagno, ad latera corporis fere extenso, margine 

 posteriori ntrinque excavata ; epigteriiis parvis, angustis, ad coxas non ex- 

 tensis ; epivieris longis, angustis, ad coxas extensis. 



]'enter segmentis quinque compositus, 1 magno, longo ; 2 et 3 perbrevibus ; 4 et 5 

 magnis, pra-longis ; apicali iutegro. 



Pedes atitici (PI. VIII , fig. 8) trocbantoribus perbrevibus; femoribus valde robustis, 

 sulitus late concavatis, marginibus ad medias acute angulatis ; tibiis late 

 dilatatis, prope medias latissimis, margine anteriori apicem versus profunde 

 excisii atque ad angulum anteriorem excisionis spinis brevibus armatii ; tarsis 

 robustis, simplicibus, triarticulatis, 1 longo, cylindrico, quasi articulis duobus 

 coniposita; 2 primo multum minori; 8 elongato, unguibus modicis, simplicibus. 

 interim dii anticis fere similibus, scd femoribus magis breviter concavatis, atque 



tibiis simplicibus et minus dilatatis, intus ad apices calcare brevi armatis. 

 posiiei precedentibus multum minores, trochanteribus permaguis, fusiformibus ; 

 femoribus simplicibus ; tibiis simplicibus, setosis, margine interior! dentata, 

 atque ad apices ealcaribus uonnullis brevibus armatis. 



Coxce (iiiteriores longa?, angustffi, prominentes, per cariuam divisa?. 

 intermedice parvse, ovales, longe distantes. 



posteriores permagnse, lougissimje, prominentes, usque ad segmentum quartum 

 ventralem extensa?, contingeiites, ad corporis latera extensa;, atque ad mar- 

 ginem exteriorem leviter laminatae. 



Body exceedingly convex, sometimes hemispheric. 



Head large, sessile, with the mouth produced and gular portion convex; eyes large; 

 antennte inserted near the eyes 



Anteuiue (PI. VIII. , tig. 7) rather short, 11-jointed, 1 very large, turgidly incrassate; 

 2 large and incrassate, smaller than the first ; 3 very long and very slender ; 

 4, 5, 6 slightly incrassated, equal in size ; 7 much smaller than the sixth ; 

 8 like the seventh ; 9-11 abrui'tlj" and very strongly incrassated, closely joined 

 together and forming a subsolid club furnished with long setie, of which the 

 intermediate joint is the shortest and the ai>ical obtusely conic. 



Maxillari/ palpi (PI. VIII., fig. 5, r) elongate, 4-jointed ; 1 small; 2 very long and 



