ATHYEETTS.— BOLBOCERAS. Ill 



three, viz. the number of teeth on the anterior tibise and the larger or smaller impunc- 

 tate space on the hind slope of the large and broad thoracic excavation, prove, on the 

 examination of more abundant material than he possessed, to be of no specific import- 

 ance. As the localities above recorded show, all three forms occur in the same places 

 from Mexico to Bahia ; and the close examination of about forty examples from the 

 various localities reveals no difference whatever of colour, form, or sculpture between 

 examples which otherwise differ in the number of the tibial teeth. Specimens-, further, 

 occur in which the uppermost tooth is shown in a transitional state, i. e. instead of a 

 distinct saw-like toothlet it is more or less rounded. The granulation of the hinder 

 slope of the suboval concavity of the thorax varies in the male according to its degree 

 of development ; and in the female, which is very much rarer than the male, the whole 

 of the concavity is uniformly granulated, besides being much shallower than in 

 the male. 



The size varies from 8 to 13 millim. 



BOLBOCERAS. 



Bolboceras, Kirby, Trans. Linn. Soc. xii. p. 459 (1818); Erichson, Ins. Deutsehl. iii. \ T p. 744; 

 Klug, Abhandl. Akad. Berl. 1843, p. 36; Westwood, Trans. Linn. Soc. xxi. p. 11 (1852). 



Upwards of a hundred species of this well-known genus have been described. It 

 has a wider range than Athyreus, being numerously represented in warm temperate 

 latitudes. An interesting feature is the great number and variety of its species in 

 Australia, which seems, in fact, to be its metropolis. Tropical America yields a 

 comparatively small number. 



1. Bolboceras sallaei. (Tab. VII. figg. 9, 6 ; 9 a, side view of head and thorax.) 



B. (Brady cineto) sevrato (Lee.) simillimus, sed coxis interniediis sicut in Bolboceralis- typicis approximatis. 

 Rotundato-quadratus, fulvo-ferrugineus, nitidus-, capite rugoso-punctulato, fronte transversim depressa,. 

 clypeo valde elevato-carinato, supra late quadrato, angulis obtuse dentatis ; thorace antice retuso sparsim 

 punctato et supra obtuse quadridentato, lateribus utrinque foveis punctatis duabus et inter foveas oblique 

 carinatis, postice sparsim plagiatim punctato, linea dorsali snbtili, marginibus crenatis ; soutello lsevi ; 

 elytris subtiliter striatis, striis punctulatis. 



Long. 17 millim. S'l 



Eab. Mexico, Valle Real [Salle), Lagos in Aguas Calientes (Edge). 



2. Bolboceras arcuatus. (Tab. VII. figg. 10, 6 ; 10a, side view of head and 

 thorax.) 



Breviter ovatus vel rotundatus, fulvo-ferrugineus, nitidus : capite antice creberrime punctulato, vertice spatio 

 laevi ; clypeo semicirculari, piano ; thorace hie illic punctis magnis pauciter consperso, linea dorsali nulla • 

 elytris grosse punctato-striatis (inter humerum et suturam striis 7). 



J . Vertex cornu valido conico acuto armatus. Thorax antice verticalis biretusus et supra obtuse 4-dentatus,. 

 dentibus duobus medianis a laterali utrinque spatio depresso separatis. 



