ACR1DIDJE. 665 



sides hardly undulating. Prosternal spine rather slender, oblique, slightly 

 curved, extending nearly to the fore border of the mesosternum. Hind 

 femora longer than the abdomen and than the hind tibiee ; spines of the 

 latter with black tips. Fore wings cinereous, a little shorter than the body, 

 with numerous small brown black-veined spots, which vary in size and 

 number; veins fawn-colour. Hind wings pellucid; veins black, whitish 

 towards the base and along the interior border. Length of the body 

 27 lines ; expansion of the fore wings 48 lines. 



a. Buidwan. Presented by Major-Gen. Hardwicke. 



21. HETERACKIS DUCALIS. 



Mas. Nigra ; vertex et prothorax Jlavo bivittati ; facies^palpi etprosterni 

 spina sordide lutea ; antennae lutece, apice rufescentes ; abdomen et 

 pedes lurida aut viridia ; tibia posticce rufce, spinis albis apice nigris ; 

 alee anticce luridce, striga basali Jtava ; alee posticce diaphance, apices 

 versus pallide fuscesceutes, venis nigris basi pallide glaucis. 



Male. Black. Vertex and prothorax with two yellow stripes, which 

 are continued on each side of the front. Face, clypeus, palpi and pro- 

 sternal spine dingy luteous. Eyes piceous. Antenna luteous, reddish 

 towards the tips. Abdomen, hind femora and four anterior legs lurid or 

 green. Hind tibiae and hind tarsi bright red; spines of the hind tibia3 

 white, with black tips. Fore wings lurid, with a yellow streak proceeding 

 from the base ; veins tawny; longitudinal veins piceous towards the base. 

 Hind wings pellucid, pale brownish towards the tips; veins black, pale 

 glaucous towards the base. Length of the body 27 33 lines; expansion 

 of the fore wings 56 60 lines, 

 a, b. Silhet. From Mr. Sowerby's collection. 

 c. ? Presented by Major-Gen. Hardwicke. 



22. HETERACETS STRANGULATA. 



Foem. Testacea ; caput nigricante quadrilineolatum, anlice angulalim 

 bicarinalum, fronle guadricarinata ; antennae fulvce; prothorax 

 carinulis tribus ferrugineis ; prosterni spina arcuata, subcompressa, 

 subobliqua, mesosternum attingens ; ata anticce cinerece, guttis dis- 

 coidalibus obscurioribus indistinctis ; alee posticce diaphance, apice 

 luridce. 



Female. Testaceous. Head smooth, elongate, with four slight 

 interrupted blackish lines ; fore part of the vertex depressed, triangular, 

 bordered by two broad oblique, punctured, connected ridges ; front roughly 

 punctured, with four well-defined ridges, the inner pair diverging slightly, 

 the outer pair diverging much. Eyes ferruginous, elliptical, oblique, with 

 brown lines. Antennae tawny. Prothorax finely scabrous, with the usual 

 four transverse impressed lines and with three slight ferruginous keels; 

 fore border and sides nearly straight; hind border hardly angular, not 

 elongated. Prosternal spine curved, slightly compressed and oblique, 

 extending to the fore border of the mesosternum. Hind femora as long as 

 the abdomen. Hind tibias shorter than the hind femora; spines minute, 

 with black tips. Fore wings cinereous, as long as the body, with some 



