CAMPONOTUS. 351 



b. Mandibles tootlied only at apex. 



a . Clypeus anteriorly emarginate in the 



middle C. )iiaiyiii(itus, p. '<MJ9. 



//. Clypeus not emarginate. 



ft'-. Scape of autennre fattened C. radiatus, p. .'571. 



//". Scape of anteuuie cylindrical. 



fl\ Length ^ mqj. over 12, ^ mm. 



over 5 mm C. siemsseni, p. •JtJl. 



I/. Length ^ maj. under 7, ^ min. 

 under 5 mm. 

 «*. Head, thorax and alDdmnen 



reddish brown C. reticulatus, p. '-jI'I. 



/>'. Head and thorax black, ab- 

 domen castaueous C. yerburyi, p. 372. 



C. Eegular arch of the thorax interrupted by 



the metanotum being raised, rounded 

 above and gibbous. 



a. Anterior lateral angles of pronotuui 



dentate or subdentate. 

 a' . Abdomen with dense, recumbent, 



sericeous golden pile hiding the 



sculpture ('. ar(riventris^ p. 374. 



h' . Abdomen without recumbent pile, the 



sculpture plainly visible C. tvasnumni, p. 375. 



b. Anterior lateral angles of pronotum 



rounded, not dentate. 

 a' . Length over 9 mm. 



rt". Thorax posteriori}' and node of 



pedicel coarsely punctured, cribvate. C. holusericeus, ]). 374. 

 U'. Thorax posterior^ and node of 

 pedicel finely reticulate - punctate, 



rugulose C. canielinus, p. 373. 



b'. Length under 9 mm C. confticii, ]>. 375. 



D. Regular arch of the thorax interrupted at 



the meso-metanotal suture by tlie meta- 

 notum forming an angle with the meso- 

 notum ; basal portion of metanotum 

 horizontal, flat or slightly concave ; apical 

 portion excavate. 



a. Tibiaj of legs spinous beneath. 



a'. Length G-10 mm.; node of pedicel 



thick, globose C. sericeKS, p. 37G. 



b'. Length 3-4 mm. ; node of jiedicel 



broader than long, somewhat nat . . ('. carians, ]>. 377. 



b. Tibiae of legs not spinous beneatli C. nirvaixc*. p. 377. 



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

 p. 3G7, V : ■'^'i^i'l' (Formica), Cat. vi (1858), p. 13, ^ 6 ■ 

 Camponotus maculatus, Fabr., race compressus {Fabr.), Forel, Jour. 

 Bomb. N. JI. Sue. vii ^892), pp. 229 Si 240. 



5 maj. Black, opaque, very finely and deiiselv reticiilate- 



* C. luteiis and C.grcta, p. 379, are omitted from this key, the workers 

 being unknown. 



