2 L-June, 



Abdomen with the basal segment whitish, blackish at its base ; second segment 

 whitish, black beneath, and with a black angnlated line on each side, leaving a 

 sub-quadrate, spade-shaped white space above, with a peduncle not extending to 

 the posterior suture ; genital organs black : third to sixth segments of nearly 

 equal lengths, the third much more tlian twice the length of the second, each 

 dark brown and blackish at its posterior end, third segment narrowly whitish 

 above at its anterior end (the rest wanting). 



Wings with a sliglit yellowish tinge along the costal mai'gin, narrow, the apex sub- 

 acute ; pterostigma rhomboidal, black ; sixteen post-cubital nervules in the 

 anterior wings. 



Length of anterior wing, 21 millimetres ; posterior wing, 20 mm. Expanse of 

 wings, 43 mm. Length of body to end of sixth segment of abdomen, 33 mm. 



I owe the possession of this remarkable insect to the liberality 

 of C. Ward, Esq., who received it from his collector in Madagascar, 

 Mr. Crossley, by whom it was taken in the interior of that island. 

 According to the comj)arative lengths of the second and third joints 

 of the antennae, and of the second and third segments of the abdomen, 

 the insect falls into the sub-genus Psilocnemis of De Selys ; but I be- 

 lieve he is now of oj)inion that the separation of Psilocnemis from 

 Platycnemis will eventually be found to have been based upon in- 

 sufficient characters. The dilatation of the two posterior pairs of 

 tibiae is enormous, much more than twice as much as is seen in Platyc- 

 nemis lati_pes of the south of Europe, which was hitherto suj)poscd to 

 possess this peculiarity in the most intensified form, and too ex- 

 aggerated to be compared with that of the British Platyc. pennifes. 

 The species of Psilocnemis were hitherto thought to be peculiar to 

 Asia and the Asiatic islands. The female of P. alnti^ies will probably 

 be found to want the dilatation of the tibise. 



Lewisham : May, 1872. 



DESCRIPTIONS OF NEW SPECIES OF DIURNAL LEPIDOPTERA FROM 



MADAGASCAR. 



BY CHEISTOPHEE WARD, F.I- S. 



AcR^A Maransetra, n. s. 



(J . Upper-side : fore-wing transparent, glossy, with the base rufous, anterior mar- 

 gin shaded with brown ; hind-wing red, a detached spot of black near the 

 base, below the costal nervure ; under this, and bordering on the inner margin, 

 a cluster of confluent spots, beyond, a band of five spots, curving inwards to 

 the anterior margin, all black ; the outer margin edged with brown, with a 

 band of seven detached semi-circular spots, black, and tipped outwardly 

 with red. 



