114 ME. smith's D-ESCBIPTIONS or HTMENOPTEEOUS INSECTS 



above ; the anterior angles acute, the posterior ones rounded. Abdo- 

 men ovate ; the scale of the peduncle transverse, each extremity armed 

 with four short teeth, 



Hab. ? 



I place this very curious Ant in the genus Echinopla with some hesita- 

 tion ; it possesses, however, all the external characters of that genus, the 

 form of the antennae, mandibles, abdomen, and the scale of its peduncle 

 resembling those of Echinopla. I have given a figure of this very interesting 

 addition to the Cryptocerida;. (Plate I. fig. 5.) 



Gren. Cataulacus, Smith. 



1. Cataulacus SETosus. C niger; capite postice recto marginibus 

 crenulatis ; thorace aspere sculpto, spinis duabus acutis postice armato ; 

 abdomine ovato, basi emarginato. 



Worker. Length 2 lines. Black ; the head, thorax, and nodes of the 

 peduncle rugose, the latter veiy coarsely so ; the head with irregular 

 longitudinal coarse striae ; the anterior margin of the clypeus widely 

 but slightly emarginate, the lateral angles acute ; the scape of the 

 antennaj and tip of the flagellum rufo-testaceous. Thorax : the sides 

 slightly narrowed to the base of the metathorax, and with a number 

 of short acute denticulations ; the two spines which arm the meta- 

 thorax are stout, acute, and curved slightly inwards. Abdomen deli- 

 cately shagreened, opake, and sprinkled with short, erect, white seta;. 

 The anterior tibiae and tarsi, the intermediate tarsi, and apical joints 

 of the posterior pair, rufo-testaceous ; the femora rugose, and with a 

 number of erect, short, rigid setae. (Plate I. fig. 7 •) 



Hab. Bachian. 



Gren. Thtnnus, Fair. 



1. Thynnus erraticus. T. niger, orbitis oculorum mandibulisque 

 flavis ; pedibus ferrugineis ; alis fusco-hyalinis. 



Male. Length 10 lines. Black; the head and thorax closely punc- 

 tured ; the scutellum and abdomen shining, and much more finely and 

 distantly punctured ; a line on the inner orbit of the eyes, a spot in 

 the middle of the clypeus, and a V-shaped mark above it, yellow ; the 

 labrum and mandibles reddish-yellow ; the clypeus truncate in front. 

 Thorax : a widely interrupted yellow line on the collar ; the meso- 

 thorax with four deeply-impressed longitudinal lines ; the wings 

 fusco-hyaline, darkest at their anterior margin and along the course 

 of the nervvu'es; the tibiae, femora, and base of the anterior tarsi 

 feiTuginous. Abdomen conical, shining, and finely punctured. 



Hab. Bachian. 



Fam. MIJTILLID^E, Leach. 



1. Mutilla suspiciosa. Smith, Livn. Proe. Soc. ii. 84 c? . 

 Hab. Borneo; Makassar; Amboytia; Bachian. 



