Longicornia of South Africa, Se. 273 
a very dense whitish tomentum ; scutellum bluntly triangular ; elytra 
very irregular, elevated at the base, and crested with a short double tuft 
of dark brown hairs, behind the middle an obliquely raised waved line, 
the sides with deeply impressed punctures ; legs varied with greyish- 
brown hairs ; sterna and lower surface of the femora clothed with long 
silvery hairs; abdomen with rusty grey hairs, a row of polished black 
spots down the middle. Length 7 lines. 
Hecyra, Thoms.,is perhaps better known under its catalogue-name 
of Omopsides. 
(iax. 
Caput antice quadratum, tuberibus antenniferis divergentibus. Ocudli 
parvi, reniformes. Antenne corpore parum longiores, basi distantes, 
scapo cylindrico, apice cicatricoso, articulis tertio quartoque «qualibus, 
ceteris gradatim decrescentibus. Prothorax quadratus, disco tubercu- 
lato, postice constrictus, ad latera obtuse angulatus. Elytra subtrigo- 
nata, irregularia, basi cristata. Pedes mediocres; femora clavata; tiie 
antic recte ; tarsi breves, articulo basali intermediorum et posticorum 
elongato-triangulari. Pro- et meso-sterna simplicia. 
This genus is founded on the Acmocera triangularis, Wh. It is, 
however, more nearly allied to Lasiopezus and Ancylonotus among 
the Lamiine, but much smaller, not being above six lines in length, 
pure snowy white, the prothorax and base of the elytra clouded with 
pale brown, a dark brown or black patch at the sides, the antenne 
and legs ringed with black and white. The type is 
Gax triangularis. (Pl. XIII. fig. 5.) 
Acmocera triangularis, White, Proc. Zool. Soc. 1858, p. 400. 
Ipactvs. 
Caput antice quadratum, tuberibus antenniferis divergentibus. Ocul 
parvi, reniformes. Antenne corpore vix longiores, scapo obconico, apice 
vix cicatricoso, articulo tertio scapo parum longiore, ceteris brevioribus 
et gradatim decrescentibus, articulo ultimo brevi, haud hamato. Pro- 
thorax quadratus, antice et postice constrictus, disco tuberculatus, ad 
latera fortiter angulatus vel dentatus. lytra irregularia, basi cristata. 
Pedes mediocres ; femora incrassata ; tibie antic breves, recte ; tarsi 
postici tibiis eequales. Pro- et meso-sterna simplicia. ' 
In the British Museum an individual of the species on which this 
genus is founded stands under, or over, the manuscript name of 
Acmocera tridens, Chevr. Its characters, however, particularly the 
absence of the terminal hook of the antenne, and the shortness of 
the prothorax, the mandibles when in repose lying in close proximity 
to the anterior coxe, and not, owing to its greater length, being 
