CAMPONOTUS. :jol 



b. Mandibles toothed only at apex. 



'. Clypeus anteriorly* emarginate in the 



middle C. maiyiiiutiu, p. 309. 



//. Clvpeus not emarginate. 



a?. Scape of antenna flattened C. radiatus, p. 371. 



b~. Scape of anteunte cylindrical. 



a 3 . Length maj. over 12, $ min. 



over 5 mm C. siemsseni, p. 3U1. 



b 3 . Length $ maj. under 7, $ min. 



under 5 mm. 

 a*. Head, thorax and abdomen 



reddish brown C. reticulatus, p. 372. 



b 1 . Head and thorax black, ab- 

 domen castaneous C. yerburyi, p. 372. 



C. Regular arch of the thorax interrupted bv 



the metunotum being raised, rounded 

 above and gibbous. 



a. Anterior lateral angles of prouotum 



dentate or subdentate. 

 a'. Abdomen with dense, recumbent, 



sericeous golden pile hiding the 



sculpture C. auriventris, p. 374. 



b'. Abdomen without recumbent pile, the 



sculpture plainly visible C. wasmanni, p. 375. 



b. Anterior lateral angles of pronotum 



rounded, not dentate. 

 a'. Length over 9 mm. 



a' 2 . Thorax posteriorly and node of 



pedicel coarsely punctured, cribrate. C. holosen'ceiis, p. 374. 

 b 2 . Thorax posteriorly and node of 

 pedicel tineh' reticulate - punctate, 



rugulose C. camdinus, p. ->73. 



b'. Length under 9 mm C. confucii, p. 375. 



D. Regular arch of the thorax interrupted at 



the meso-metanotal suture by the meta- 

 notum forming an angle with the meso- 

 notum ; basal portion of metanotuui 

 horizontal, flat or slightly concave ; apical 

 portion excavate. 



a. Tibiae of legs spinous beneath. 



a. Length 0-10 mm.; node of pedicel 



thick, globose C. scricetw, p. 370. 



'. Length 3-4 mm. ; node of pedicel 



broader than long, somewhat flat . . C. variant, p. 377. 



b. Tibi.B of legs not spinous beneath C. nirvantc*, p. 377. 



401. Camponotus compressus, Fabr. (Formica), Mant. Ins. i (1787), 



p. 307, $ ; Smith (Formica), Cat. vi (1858), p. 13, rf. 

 Camponotus maculatus, Fabr., race compressus (Fabr.), Furtl,Jottr. 

 Bomb. X. H. Soc. vii i!892), pp. 229 & 240. . 



$ maj. Black, opaque, very finely and densely reticulate- 



* C. luteus and C. grette, p. 379, are omitted from this key, the workers 



being unknown. 



