AORIDIDjE. 583 



tibiae and hind tarsi luteous, spines of the former wilh hlack tips. Fore 

 wings brownish cinereous, longer than the body ; aniemedial half with 

 brown spots and patches; veins tawny, red towards the base. Hind wings 

 pale cinereous, broadly clouded with brown about the tips; veins black, 

 pale testaceous towards the base and towards the interior border. Length 

 of the body 23 lines; expansion of the fore wings 50 lines. 



a. West Coast of America. Presented by Capt. Kellett and Lieut. Wood. 



25. ACRIDIUM SEMIVITTATUM. 



Fcem. Sordide luteum ; caput pallide iuteum, nigro bivittatum et 

 bistrigatum, vertice antico piano lanceolato, facie labroque piceis ; 

 antennce fulvce basi nigricantes ; prothorax vix carinatus, nigricante 

 tuber culatus, vittis tribus anterioribus pallide luteis nigro ex parte 

 marginatis, margins postico nigro-gultato ; prosterni spina robusta, 

 longiuscula ; alee anticce cinerece, corpori cequilongce, maculis plurimis 

 magnis fasciisque duabus obliquis nigricantibus ; alee poslicce nigro 

 venosce. 



Female. Dingy luteous. Head pale luteous ; vertex with an irregular 

 black stripe on each side, its fore part flat, hexagonal ; a black lanceolate 

 streak proceeding from each eye to the mouth ; front with four keels, the 

 inner pair parallel, the outer pair diverging towards the face, which like the 

 labrum is mostly piceous. Eyes piceous, elongate-elliptical. AniennaB 

 tawny, blackish towards the base. Prothorax with minute blackish 

 tubercles, with a very slight keel and with transverse impressed lines ; 

 anterior part with three pale luteous stripes, of which two are lateral and 

 are bordered on each inner side by a short black stripe ; fore border and sides 

 slightly rounded ; hind border elongated, somewhat conical, with a row of 

 black dots. Prosternal spine stout, rather long. Hind femora nearly as 

 long as the abdomen, a little longer than the hind tibiae ; spines of the 

 latter pale luteous, long, with black tips. Fore wings cinereous, as long 

 as the body, with many large blackish spots and with two intermediate 

 oblique blackish bands. Hind wings with black veins. Length of the 

 body 24 lines ; expansion of the fore wings 52 lines. 



a. Venezuela. From Mr. Birschell's collection 



26. ACRIDIUM LURIDESCENS. 



Mas et foem. Fulvum ; caput nigro subbivittalum, vertice antico piano 

 hexagonali, fronte nigra ; antennce picece ; prothorax aspere scaber, 

 vix carinatus, margine postico vix angulato ; prosterni spina robusla, 

 recta, vix obliquo ; femora postica nigricante sublineata ; tibice 

 poslicce spinis albis apice nigris ; alee anlicce cinerece, corpore vix 

 breviores, maculis plurimis nigro-venosis ; alee poslicce luridce, nigro 

 venosce. 



Male and female. Tawny. Head smooth, with two irregular black 

 stripes ; fore part of the vertex flat, hexagonal ; front punctured, mostly 

 black, with four keels, the inner pair hardly diverging, the outer pair 

 slightly diverging. Eyes livid, fusiform. Antennse piceous. Prothorax 

 roughly scabrous, with a very slight dorsal keel and with the usual four 

 transverse impressed lines; fore border rounded; sides slightly rounded ; 



