A taxonomic revision of the Asian endemic subgenus Physocrema of the genus Crematogaster (Hymenoptera: Formicidae) Hosoishi, Shingo Ogata, Kazuo Zootaxa 2009 2062 15 36 ZBKN [806,917,808,835] Insecta Formicidae Crematogaster Animalia Hymenoptera 4 19 Arthropoda species bakeri    1 Propodeal spines developed and with pointed apices................................................................................................... 2  - Propodeal spines undeveloped and forming obtuse lobes ............................................................................................ 4   2 Antennal club 3-jointed. Pronotum raised steeply toward mesonotum in lateral view ................................  mucronata  - Antennal club 4-jointed. Pronotum raised moderately toward mesonotum in lateral view ......................................... 3   3 In lateral view, pronotum and mesonotum forming a single convexity, propodeum distinctly raised relative to prome- sonotum, metanotal groove deep .........................................................................................................................  vacca  - In lateral view, pronotum and mesonotum forming a single convexity, propodeum slightly raised relative to prome- sonotum, metanotal groove less deep .................................................................................................. yamanei  sp. nov.   4 Dorsal median portion of head swollen ................................................................................................ tanakai  sp. nov.  - Dorsal median portion of head not swollen .................................................................................................................. 5   5 Propodeal spiracle situated near the metapleural gland orifice, the distance between them about the same as the propodeal spiracle diameter ( Fig. 4) ............................................................................................................................. 6  - Propodeal spiracle situated away from the metapleural gland orifice, the distance between them much greater than the propodeal spiracle diameter ( Fig. 3) ....................................................................................................................... 9   6 Clypeus smooth and shining without longitudinal rugulae ( Fig. 1) ..................................................................... inflata  - Clypeus striated with rugulae ( Fig. 2) .......................................................................................................................... 7   7 Dorsal face of head strongly striated with abundant longitudinal rugulae. Scape not reaching posterior corner of head in large workers. Workers with pronounced size polymorphism .......................................................................... aurita  - Dorsal face of head not strongly striated with longitudinal rugulae. Scape reaching posterior corner of head. Workers monomorphic in size..................................................................................................................................................... 8   8 The posterior portion of pronotum with transverse rugulae in dorsal view ( Fig. 6) .................................. physothorax  - The posterior portion of pronotum without distinct rugulae in dorsal view ( Fig. 7) .......................................... onusta   9 Dorsal setae on posterior portion of fourth abdominal tergite directed medially ( Fig. 8) ................................ difformis  - Dorsal setae on fourth abdominal tergite directed posteriorly ( Fig. 9)....................................................................... 10   10 In lateral view, dorsal profile of promesonotum convex, propodeum distinctly raised relative to promesonotum, metanotal groove very deep ................................................................................................................................ sewardi  - In lateral view, dorsal profile of promesonotum convex, propodeum slightly raised relative to promesonotum, metanotal groove not so deep in dorsal median portion ................................................................................ ampullaris