ACRIDITY. 621 



Male. Tawny, slender, testaceous beneath. Head and prothorax 

 with two irregula/black stripes which do not extend beyond the hindmost 

 transverse line of the prothorax. Head smooth ; tip of the vertex sub- 

 hexagonal, slightly bordered with black; front thinly punctured; keels 

 well defined ; inner keels parallel ; outer keels slightly diverging towards the 

 face. Eyes ferruginous, elliptical.' Antennae piceous, tawny towards the 

 base. Prothorax thickly punctured, slightly wider hindward ; keel not 

 apparent; transverse impressed lines distinct; fore border and sides 

 slightly rounded; hind border elongated, rounded. Prosternal spine pale 

 yellow, rather long and stout. Femora and tibiae dotted with black ; hind 

 femora as long as the abdomen, with two black bands above; hind tibiae a 

 little shorter than the hind femora, their spines with black tips. Wings 

 cinereous. Fore wings nearly as long as the body, with many spots which 

 are formed by black veins and towards the base are nearly wholly black; 

 veins elsewhere pale. Length of the body 15 lines ; expansion of the fore 

 wings 30 lines. 



a. Galapagos. Presented by C. Darwin, Esq. 



ACRIDIUM DECOEIPES. 



Mas. Fulvum, sat robustum, subtus testaceum ; prothorax subtiliter 

 scaber, vix carinatus, nigricante lineolatus ; prosterni spin a crassa, 

 obtusa ; femora postica extus nigricante serrato vittata, intus nigro 

 triplagiata, subtus coccinea ; tibice posticce albidce, subtus coccinece ; 

 al( anticcc cinerece, corpore breviores. 



Male. Tawny, rather stout, testaceous beneath. Head smooth ; tip 

 of the vertex hexagonal ; front largely punctured, with four strongly-marked 

 nearly parallel keels. Eyes lurid, elliptical, with black lines. Prothorax 

 finely scabrous, with indistinct longitudinal blackish lines and with a very 

 slight keel ; transverse impressed lines distinct ; fore border hardly rounded ; 

 sides slightly rounded; hind border much rounded. Prosternal spine 

 thick, obtuse and rounded at the tip. Hind femora with a foliaceous 

 blackish stripe on the outer side and with three black patches on the inner 

 side, bright crimson beneath, a little longer than the abdomen; hind tibiae 

 whitish, bright crimson beneath, rather shorter than the hind femora, their 

 spines with black tips. Fore wings cinereous, rather shorter than the body ; 

 veins tawny. Hind wings slightly cinereous ; veins black, tawny at the 

 base and along the interior border. Length of the body 15 lines ; expan- 

 sion of the fore wings 28 lines. 



a. Rio Janeiro. Presented by A. Fry, Esq. 



ACRIDIUM PROPBIUM. 



Mas. Ferrugineum, gracile, subtus testaceum ; caput et prothorax testaceo 

 univittata, capitis vitta nigricante marginata ; prothorax subtiliter 

 scaber, poslice subtatescens, margine postico subangulato ; prosterni 

 spina gracilis, subacuta ; abdomen albido-testaceum, segmentis ferru- 

 gineo marginatis ; tibiae posticce spinis albis apice nigris ; alee antica 

 cinerece, corpori aquilonya. 



Male. Ferruginous, slender, testaceous beneath. Head and prothorax 

 with a testaceous stripe which is broadest and blackish-bordered on the 



