PIIASMIDJ3. METRIOTES. 



161 



none of the beautiful variegated reticulations of that spe- 

 cies. The general colour is dark brown, with a slight ob- 

 scure greenish tinge. The head, pro- and mesothorax are 

 finely tuberculated, the tubercles being minute and white ; 

 those of the head arranged in several longitudinal rows. 

 The metathorax is also armed with a number of small 

 erect spines, bent backwards at their tips. The antennae 

 are rather thickened at the base, with the joints consider- 

 ably elongated. The tegmina are oval, obscure brown, with 

 the reticulations black and numerous. The wings are shorter 

 than in M. Diodes, with the costal area broad, opake, 

 brown, paler at the base, and slightly irrorated with white 

 towards the tip ; the hinder portion is semipellucid, 

 slightly tinged with fulvous, with the longitudinal veins 

 fulvo-luteous. The legs are rather short, setose, unarmed ; 

 the fore femora slightly dilated ; the basal joint of the tarsi 

 short. The abdomen is moderately broad ; the terminal 

 segments above carinated down the middle ; the three ter- 

 minal segments of nearly equal length, but gradually nar- 

 rowed ; the last rounded behind. The operculum is very 

 short, not extending beyond the seventh dorsal segment, 

 the internal appendages forming two rows of flattened 

 plates ; the anal styles exserted and setose. 



Plate XV. Fig. 6. The female, of the natural size. 6 a. The 

 terminal segments of the abdomen seen from beneath. 



8. (423.) Metriotes Diodes, Westw. 

 Plate XV. fig. 1, female. 



Fusca, gracilis ; capite, pro- et mesothorace parum gra- 

 nulosis, his supra planis, angulis lateralibus spinulosis ; 

 tegminibus ovalibus, sordide luteis, vitta indistincta obscura; 

 alis elongatis, area costali fusco-lutea fusco nebulosa ; area 

 postica pellucida, basi extrema cserulea, plaga fusca extus 

 cincta, venis transversis fusco nebulosis (mas et fcom.). 



Long. corp. maris, unc. 2f ; cap. lin. \\ ; anten. unc. 2\ ■ 

 proth. lin. 1£ ; mesoth. lin. 4 ; metath. lin. 5 ; abdom. 

 lin. \A\ + lin. 3|- = lin. 18 ; tegm. sing. lin. 6 ; alar, ex- 

 pans, unc. 34;. 



Long. corp. fcem. unc. 3 ; cap. lin. 2 ; anten. lin. 24 ; 

 proth. lin. 2 ; mesoth. lin. 5 ; metath. lin. 6 ; abdom. lin. 15 

 + Iin. 5=lin. 20 ; tegm. sing. lin. 9 ; alar, expans. unc. A\. 



Hab. Columbia (D. Gaudichaud) . In Mus. W. W. 

 Saunders. 



This species is well distinguished by the beautiful patch 

 of pale blue at the base of the posterior area of the wings, 

 which is immediately surrounded by a dark brown spot. 

 The head is oblong, flattened above, opake, slightly rugose, 

 and with the hinder part immediately in front of the pro- 



thorax transversely elevated. The antennae of the male 

 are as long as the body, and slender, with the joints elon- 

 gate ; those of the female are thickened towards the base. 

 The head, pro- and mesothorax are dirty luteous, with 

 several dusky lines, marked, especially on the head, with 

 minute tubercles. The prothorax and mesothorax are flat- 

 tened above and granulose, with the lateral angles acutely 

 deflexed. The tegmina are oval, about as long as the head, 

 pro- and mesothorax united j they are dirty luteous-coloured, 

 with an ill-defined darker streak down the middle, the 

 central ridge being but slightly indicated. The wings are 

 large ; the costal area obscurely coloured with dirty luteous 

 and darker brown cloudings ; the main vein is furcate at a 

 short distance from the base ; the posterior area of the 

 wings is pellucid, with a small pale blue spot at the base, 

 followed by a large dark brown patch, shaded gradually off 

 behind ; all the transverse veinlets of the wings clouded 

 with brown. The legs are rather short, simple, and finely 

 hirsute ; the anterior femora subcompressed ; the tarsi short, 

 with the basal joint about as long as the second and third 

 united. 



The male is much narrower than the female, with the 

 legs more slender, and generally of a paler luteous tint. The 

 fifth, sixth and seventh segments of the abdomen are gra- 

 dually widened ; the eighth short, gradually narrowed, with 

 the posterior margin deeply and acutely emarginate in the 

 middle ; and the ninth segment is very small and deeply 

 notched, with the two anal styles porrected, curved, form- 

 ing a small forcipated appendage ; the three terminal seg- 

 ments beneath are nearly flat, and the last is rounded at 

 its extremity. The abdomen of the female is gradually 

 attenuated, with the terminal segments carinated and of 

 nearly equal length, the last being bi-emarginate behind, ex- 

 posing the porrected anal styles ; the oviduct is very short, 

 scarcely extending beyond the seventh dorsal segment, the 

 interior appendages forming a double series of flattened 

 plates. 



Plate XV. Fig. 1. The female, of the natural size. la. The 

 terminal segments of the abdomen seen from beneath. 1 b. 

 The same seen laterally. 



9. (424.) Metriotes venosa. 



Olivaceo-fusca, antennis (corpore longioribus) pedibus- 

 que viridi annulatis ; alarum area antica viridi venosa, pos- 

 tica fusca, nervis transversis infuscatis ; capite triocellato ; 

 tegminibus tuberculo elevato obtuso subbasali. 



Long. corp. fcem. unc. 2^; cap. lin. If ; anten. unc. 3; 

 proth. lin. If; mesoth. lin. 3£; metath. lin. 4|; abdom. 

 lin. 18 ; tegm. lin. 6 ; alar, expans. unc. 4. 



