and Gyrinide of Australasia. 15 
basi recto, transverso, disco acuducto, ad latera et postice punctato ; 
scutello lato, triangulari; elytris parallelis, leviter striato-punctatis, 
passim et confertim acuductis; corpore subtus rufo, ad apicem fusco ; 
pedibus antennisque rufis. 
Long. corp. 24 lin., lat. 1 lin. 
Of the size and colour generally of C. latipes, Brull., of S. America ; 
the thorax differs in form (is less deep longitudinally, and the basal 
line is transverse, not oblique); the surface entirely differs, being 
levigate, and finely and sparingly punctate-striate, the interstices 
throughout being covered with minute longitudinal markings, as 
though scratched by a needle. 
An example of this interesting insect is in Mr. Bakewell’s collec- 
tion, from Australia. 
Tribe IV. CotyMBETIDZ. 
Genus 1. Barracnomatus, Schaum & White (ined. Brit. Mus. 
Cat. Hydrocanth. p. 27). . 
Corpus ovatum, valde depressum. Antenne setacez, articulo primo 
longiore. Zabrum transversum, ad medium subemarginatum. Mentum 
bilobatum (vix trilobatum). Palpi mazillares quadri-articulati, arti- 
culo penultimo ad basin constricto, apicali longiore ovali: palpi labiales 
art. primo ad basin constricto, 2ndo brevi, apicali robusto longiore ad 
apicem obliquato. Caput latum, porrectum: oculis magnis haud ex- 
stantibus. Thorax latus, depressus, ad latera subrotundatus. Elytra 
paululum thorace latiora, breviter ovalia, valde depressa, Scutellum 
haud dubito triangulare et distinctum. Pedes fortes et breves: tarsis 
anterioribus quinque-articulatis ; wagwiculis eequalibus; tarsis posticis 
quinque-articulatis, ciliatis, robustis. 
B. Wingti (Brit. Mus. Cat. Hydrocanth. p. 27, MS.). 
B. ovatus, depressus, latus, impunctatus, niger, rufo lineatus, nitidus; 
capite magno, lato, subporrecto, ad apicem rufo; thorace antice exca- 
vato, ad latera subrotundato, basi transverso, ad apicem transverse 
punctorum levi serie ornato, minutissime punctulato, nigro, mar- 
ginibus (lateribus latius) rufis; scutellum in unico exemplo caret ; 
elytris vix thorace latioribus, depressis, nigris, linea flavo-rufa lata a 
basi ad post medium longitudinali, alteraque obliqua a margine post 
medium ad apicem; antennis rufis; pedibus rufis; corpore subtus rufo- 
nigro. 
Long. corp. 4 lin., lat. 14 lin. 
The single species for which this genus is constructed is as in- 
teresting in the pattern of its coloration as the genus is remarkable 
for its form. 
When viewed under a high power, the surface is seen to be covered 
