42 



MR. F. SMITH ON HYMENOPTEROUS INSECTS 



peduncle very coarsely and closely punctured, producing a rugged 

 surface. The thorax, with two short stout acute spines bent inwards, 

 the metathorax with two long divergent acute spines ; the peduncle 

 with two long acute spines, which curve to the shape of the base of 

 the abdomen ; the legs ferruginous, more or less obscurely so. The 

 abdomen globose, smooth, and shining. (PL I. fig. 15, and 16 var.) 

 Hah. Celebes (Tondano). 



18. Polyrh achis Vibidia. P. niger, capite thoraceque rude punc- 

 tatis ; thorace ovato, antice posticeque abdominisque squama spinis 

 duabus acutis armatis ; abdomine ovato. 



Female. Length 3^ lines. Black ; the head and thorax with large 

 deep punctures ; the head with a large prominence in front, the lateral 

 margins of which are expanded into elevated flat scales, beneath which 

 the antennae are inserted, the extreme tip of the latter pale rufo- 

 testaceous ; the eyes very prominent. Thorax ovate, with a short 

 stout spine on each side in front ; the metathorax with two stout acute 

 spines, rather longer than the front ones ; the node of the peduncle 

 with two short divergent acute spines ; the tibiae and femora ferrugi- 

 nous, the apex of the latter and base of the former dusky or black ; 

 the claws of the tarsi rufo-testaceous. Abdomen globose, smooth and 

 shining ; the entire insect thinly covered with cinereous pubescent 

 pile. (PL I. fig. 17.) 



Hab. Celebes (Tondano). 



19. Polyrh achis Chaonia. P. niger, pube pallide aurea vestitus ; 

 thorace bidentato ; petioli squamula bidentata ; femoribus tibiisque fer- 

 rugineis; alis fusco-hyalinis. 



Female. Length 4 lines. Black, and clothed with a cinereous pubes- 

 cence, which has a pale golden lustre, particularly on the head and 

 thorax ; that on the abdomen is more inclining to grey, but has a 

 golden tint in some lights ; the mandibles black. Thorax armed in 

 front with two short acute spines ; the legs ferruginous, with the tarsi 

 black ; wings fusco-hyaline, nervures testaceous. Abdomen globose ; 

 the scale of the peduncle with two short stout spines. (PL I. 

 fig. 18.) 



Hub. Gilolo. 



20. POLYRH achis Numkkia. P. niger; thorace supra dcplanato, 

 spinis duabus anterioribus ; abdominis squamula spinis duabus ercctis 

 acutis, utraque ad basin minute unispinulosa. 



Worker. Length '.i lines. Black, and covered with silky cinereous pile ; 

 the thorai flattened above, and slightly curved longitudinally to the 

 verge of the truncation of the metathorax, the spines on the pro- 

 thorax stout, short and acute; tin; margins of the thorax slightly 

 raited. Abdomen globose, truncate at the base; the node of the pe- 

 duncle broad, transverse above with an erect spine at each lateral 



