2^^€w Land- Shells from Flores, Malay Archipelago. 623 



length, and forms, back downwards, a sort of bridge between 

 the heads of the two ants. 



If the disgorging ant carries an Antennophorus beneath its 

 head, this, too, takes its sliare in the meal. An Antenno- 

 phorus placed on the abdomen of an ant can also obtain food 

 without quitting its hold. In fact, when another ant comes 

 near it, it seems to understand, by striking it with its antenni- 

 form feet and stretching towards it its first pair of ambulatory 

 feet, to ask for and to obtain food. 



In conclusion, the Antennophoi'us is a parasite which lives 

 as an epizoon on Lasius and feeds upon the nutritive liquid 

 disgorged by the ants. This recalls what I have already 

 described for Lepismina poJypoda Q Comptes Rendus,' t. cxii. 

 p. 799; see this Journal, 1896, vol. xvii. p. 398); but here 

 we have a case of myrmecophily far more advanced, since 

 the Antennophorus feeds itself exclusively on the disgorged 

 liquid, and, further, its presence is regarded as a matter of 

 course by the ant, which gives, even willingly, the food it 

 demands. 



LXV. — Diagnoses of new Land- Shells from Flores^ 

 Malay Archipelago. By Edgar A. Smith. 



The species about to be described form part of a valuable 

 collection of land-shells obtained by Mr. A. Everett in South 

 Flores. The typical green form of Xesta Everetti is one of 

 the most remarkable shells yet discovered in this or the 

 neighbouring islands. 



Xesta Everetti. 



Testa turbinata, anguste umbilicata, saturate viridis, versus apicem 

 purpurea, infra suturam albo marginata ; spira conoidea ; anfrac- 

 tus 7, convexiusculi, lineis iucrementi tenuibus, obliquis, arcuatia 

 striati, superiores miuute spiraUter striati, ultimus baud 

 descendens ; apertura parum obliqua, intus ca^rulco-alba ; peri- 

 stoma tenue, margine columellari ad iusertionem dilatato albo 

 reflexo. 



Diam. maj. 53 millim., min. 43 ; alt. 50 ; apertura 30 longa, 27 lata. 



Var. Testa viridis, aufr. ultimo et penultimo supra medium rufo 

 obscure zonatis. 



Diam. maj. 55 millim., min. 50; alt. 57. 



Var. Testa olivaceo-fuscescens. 



Diam. maj. 54, min. 46; alt. 50. 



Hub. tSoutli Flores. 



I'his is an extremely fine species and probably the largest 

 of the genus yet discovered. The very deep green colour of 



