CA3*lPONOTUS. 



351 



b. Mandibles toothed only at apex. 



a'. Clvpeus anteriorly emarginate in the 



nJiddle C. maiyinatus, p. 3G9. 



h'. Clypeus not emarginate. 



a'-. Scape of autennm tiattened C radiatus, p. 371. 



b-. Scape of antennie cylindrical. 



«3. Length § maj. over Vl, ^ min. 



over 5 mm C siemsseni, p. 301. 



i\ Length ^ maj. under 7, ^ "'"'• 

 nnder 5 mm. 

 a*. Head, thorax and ahdonien 



reddish brown C reticuMus, p. 372. 



bK Head and thorax black, ab- 

 domen castaneous C. yevbiiryi, p. 372. 



0. Regular arch of the thorax interrupted by 

 the metanotum being raised, rounded 

 above and gibbous. 



a. Anterior "lateral angles of pronotuni 



dentate or subdentate. 

 a'. Abdomen with dense, recumbent, 



sericeous golden pile hiding the 



sculpture . '. C. anrirentris, p. 374. 



h' . Abdomen without recumbent pile, the 



sculpture plainly visible C. wasmutmi, p, 375. 



b. Anterior lateral angles of pronotum 



rounded, not dentate. 

 a' . Length over 9 mm. 



d~. Thorax posteriorly and node of 



pedicel coarsely punctured, cribrate. C. holosericens, p. 374. 

 b-. Thorax posteriorly and node of 

 pedicel finely reticulate - punctate, 



rugulose . . '. C. camelhms, p. -■573. 



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 metanotum 

 horizontal, fiat or slightly concave ; apical 

 portion excavate. 

 a. Tibiffi of legs spinous beneath. 



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



thick, globose C. sericeus, p. 370. 



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



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

 h. TibiiB of legs not spinous beneatli C. nirvcmcc*. p. 377. 



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

 p. 307, § ; Smifli (Formica), Cat. vi (1858), p. 13, $ cJ . 

 Camponotus maculatus, Fabr., race compressus (i-tj^r.), Forel,Jotir. 

 Bomb. y. H. ^oc. vii (1892), pp. 229 & 240. . 



5 iiHtj. Bhick. opaque, very finely and densely reticulate- 



* C. hifeiia f\m\ C.grcfce, j). 37'J, are omitted fruui this key, the woi-kers 

 being unknown. 



