Mr. F. Walker on some undescribed Ceylon Insects. 373 



clavato, mesothorace sublineato, abdomine latiusculo, pedibus pi- 

 ceis, alis albidis, venis stigmateque testaceis. 



Female. Black, rather slender, slightly shining, very finely 

 punctured. Head elongate-quadrate ; mandibles large, tawny. 

 Antennae nearly half the length of the body ; scape subclavate, 

 about two-thirds of the length of the flagellum ; the latter tawny, 

 subclavate. Prothorax and inetathorax well developed ; mesothorax 

 with a slight middle line. Abdomen broader than the thorax. 

 Legs piceous. Wings whitish ; veins and stigma testaceous ; the 

 former in structure like those of Tapiaoma erratica. Length of 

 the body 4 lines ; of the wings 6 lines. 



Formica indeflexa. Foem. Picea, gracilis, aptera, scitissime 

 punctata, capite sat magno, mandibulis parvis, autennis subfilifor- 

 mibus corporis dimidio non longioribus, flagello basi scapoque 

 testaceis, thorace subcompresso, pedibus fulvis, tibiis nigris basi 

 fulvis, tarsis testaceis. 



Female. Piceous, slender, apterous, very finely punctured. Head 

 rather large ; mandibles small. Antennae slender, not more than 

 half the length of the body, nearly filiform ; scape tawny, much 

 shorter than the flagellum, the latter tawny towards the base. 

 Thorax somewhat compressed ; metathorax, peduncle and its node 

 well developed. Abdomen mutilated. Legs tawny ; tibiee black, 

 tawny at the base ; tarsi testaceous. Length of the body 4 lines. 



Formica consultants. Mas. Nigra, elongata, scitissime punctata, 

 capite parvo antice fulvo, mandibulis minimis, antennis piceis fili- 

 formibus corpore valde brevioribus, scapo brevissimo, abdomine 

 rufescente elliptico fascia media nigra, pedibus testaceis, alis cine- 

 reis, latiusculis, venis testaceis, stigmate piceo, 



Male. Black, elongate, slightly shining, very fineiy punctured. 

 Head rather small, tawny in front ; mandibles very small. An- 

 tennae piceous, slender, filiform, much shorter than the body ; 

 scape very short. Abdomen reddish, elliptical, a little broader 

 than the thorax, with a black middle band. Legs testaceous, 

 slender. "Wings cinereous, rather broad ; veins testaceous, in 

 structure much like those of Formica exercita; stigma piceous. 

 Length of the body 3 lines ; of the wings 5 lines. 



Polyrhachis illaudatus. Mas. Niger, subaurato-tomentosus, 

 clypeo subsulcato lateribus elevatis, antennis filiformibus corpore 

 paullo brevioribus, scuto bispinoso, scutello emarginato, meta- 

 thorace lateribus elevatis incisis postice bispinoso, abdomine lato 

 brevissime elliptico, pedibus robustis. 



Male. Black, apterous, with slightly gilded tomentum. Cly- 

 peus with a very slight middle furrow, and with a ridge along 

 each side. Antennae filiform, a little shorter than the body ; 

 scape very long, but shorter than the flagellum. Scutum with 

 two long sharp spines, which are directed obliquely forward ; 

 scutellum shield-shaped, truncated at the tip, emarginate on each 

 side. Metathorax with a notched rid<*e on each side. Peduncle 



