154 HEMIPTERA-HOMOPTERA. 
and base of tegmina closely and distinctly punctured; tegmina subhyaline, with strong veins; legs 
rufescent. 
Long. cum tegm. 5 millim.; lat. int. corn. 23 millim. 
Hab. Mexico (Mus. Oron.). 
One female specimen, recently detected by myself in the Oxford Museum. It is 
possible that the rufescent colour may be due to immaturity, and that the ordinary 
colour may be much darker. 
SPHAZROCENTRUS, gen. nov. 
Genus Campylocentro affine, sed corpore elliptico, convexo, elongato-subgloboso, cornibusqde pronoti multo 
brevioribus, sepius fere vel totis deficientibus facile distinguendus. 
Allied in several respects to Campylocentrus, but easily distinguished by its elliptical, subglobose, and very 
convex form, and the formation of the pronotal horns, which are, when most pronounced, short and very 
blunt, and are often almost or entirely wanting, their place being taken by short and obtuse prominences. 
Stal (Ofv. Kongl. Vet.-Ak. Férh. 1869, p. 289) includes the species from which the 
above description is taken in Campylocentrus; but, if any weight at all is to be allowed 
to facies and general appearance, it certainly ought to form the type of a new genus, 
for hardly any two insects belonging to the same family could look much more different 
than Campylocentrus hamifer and this species. ‘There is not much difference in the 
venation of the tegmina between the two genera, but Sph@rocentrus has the tegmina 
much duller and very minutely reticulate. The posterior process of the pronotum is 
very stout, and strongly lobed beneath. 
1. Spherocentrus curvidens. (Tab. IX. figg. 17, 17, b.) 
Centrotus curvidens, Fairm. Ann. Soc. Ent. Fr. sér 2, iv. p. 515". 
Centrotus subspinosus, Fairm. loc. cit. p. 519”. 
Hab. Mexico!? (Mus. Holm., Mus. Roy. Belg.), Cuernavaca and San Marcos 
(Bilimek, in Mus. Vind. Ces.), Orizaba (Bilimek, H. H. Smith, and F. D. Godman), 
Atoyac in Vera Cruz (Schumann), Chilpancingo and La Venta in Guerrero, Teapa in 
Tabasco (fl. H. Smith); GuateMata, Coban and San Gerénimo in Vera Paz, El Reposo, 
Las Mercedes, San Isidro, Pantaleon (Champion); Costa Rica, Volcan de. Irazu 
(Rogers); Panama, Bugaba, Volcan de Chiriqui (Champion). 
The larger and more distinctly horned specimens are mostly females, and the smaller 
and darker specimens in which the horns are rudimentary are mostly males, but this 
distinction cannot always be relied upon. The colouring of the tegmina is very 
variable; the light and dark variegation is especially marked in the series from 
Chilpancingo, which were all taken at a considerable altitude. 
There is a single specimen from La Venta, Guerrero, which may belong to a different 
species, but it is imperfect. 
An example from San Isidro is figured. 
