Ants found on acacia of the genus Vachellia and other savannah trees at Mkomazi Game Reserve, Tanzania with the description of a new species Hymenoptera: Formicidae Mcgavin, George Mcgavin Mcwilliam, Nicholas Belgian Journal of Entomology 1907 99 1 47 JKW 7479 [790,946,189,218] Insecta Formicidae GBIF Animalia Hymenoptera 25 26 Arthropoda subFamily Formicinae    Camponotus( Myrmisolepis) erinaceusGerstäcker, 1871; CASENT0905434, major worker. A medium sized ant, minor TL 6.7 mm. Typelocation Arusha, Tanzania. One finding of 3 specimenson  H. lucens(Tree 3/51); major and minor workers.  Camponotus( Myrmopelta) kollbrunneriForel, 1910; CASENT0910461, super major. A medium sized ant, the minor has not been not described, major TL 8.0 mm. First report from Tanzania; typelocation Ethiopia. One finding on  H. lucens(Tree 3/50), 4 specimens, major worker illustrated, with a normal sized head for the genus.  Camponotus( Myrmosericus) flavomarginatusMayr, 1862, CASENT0915599, major worker. A large ant, minor TL ca 6 mm, major TL 9 mm. First report from Tanzania; widespread across sub-Saharan Africa. Known as a quite common ground-nesting species that forages on trees. Five findings - 3 on  V. zanzibarica(Trees 5/16, 5/17 & 5/28), 19- 46 specimens; 1 on  Grewiasp(Tree 2/15), 1 specimen; 1 on  T. brownii(Tree 3/68), 6 minor workers.  Camponotus( Myrmosaga) jeanneliSantschi, 1914, CASENT0911648, major, CASENT 0911649, minor worker. Typelocation Kenya, no other reports. Two findings both on  V. nilotica(Trees 5/55, 2 specimens, & 5/64, 5 specimens); range of worker sizes.   Camponotus( Myrmosaga) mombassaeForel, 1886, revived status; no images on Antweb. A medium sized ant, major (?) TL 5.6 mm. First report from Tanzania; previously known only from holotypeworker from Mombasa, Kenya, later inexplicably synonymized with  C. acvapimensisfrom which it is very distinct. Forel’s description has the propodeum as very narrow, very inclined, feebly concave from front to back, much longer than the declivity from which it is separated by a very obtuse, rounded angle. One finding of 3 workerson  O. holstii(Tree 3/56) which match the Forel description.   Camponotus( Myrmotrema) ilgiiForel, 1894, CASENT0910497, worker. A medium sized ant, major-media TL 4.2-4.7 mm. Single dealate queen only on  Ochna holstii(Tree 3/56), not fully verifiable; first report from Tanzania; earlier reports from spines of  V. fistulaSchwf.and  V. busseiHarms.   Camponotus( Myrmotrema) olivieriEmery, 1892, ssp. lemmaForel var. moshianaForel, 1907) typelocation Tanzania, Moshi, CASENT 09022408. A medium sized ant, major-media TL 4.0- 5.8 mm.  C. olivieriin many varieties is widespread in sub-Saharan Africa. Four findings; three on  V. zanzibarica, 1- 3 specimens(Trees 5/17, 5/27 & 5/28); one on  T. brownii(Tree 3/68), 1 specimen; minor workers.   Camponotus( Orthonotomyrmex) sericeus(Fabricius, 1798); no typeimages but well known. A medium sized ant, minor TL 6-8.2 mm, major TL 8.0- 10 mm. Common pan-African species; ground-nesting and foraging. ROBERTSON (1999) reported it from Mkomazi grassland and woodland. Single finding, one major worker on  D. cinerea(Tree 2/34).   Lepisiota depressa(Santschi, 1914); CASENT0912376 (note – the location label is correct but the name label is wrong). A small ant, TL 2.2-2.3 mm. Firstreport from Tanzania; typelocation Kenya(coastal area, River Ramisi). Singlefinding of one specimen on  V. dendropanolobium(Tree 5/60).   Plagiolepis alluaudiEmery, 1894; CASENT0101699. Typelocation Seychelles. A minute ant, TL 1.4-1.5 mm. Reported from Tanzaniaby Forel (1907), Arusha-Chini, close to Mkomazi. Five findings; one on  V. zanzibarica(Tree 5/17), 2 specimens; one on  C. molle(Tree 3/65), 1 specimen; two on  H. lucens(Trees 3/50 & 3/51), many and 12 specimens; one on  O. holstii (Tree 3/56), 3 specimens.   Plagiolepis pictipes Santschi, 1914; CASENT0912411. Typelocation Mbuyuni, Kenya, holotypespecimen only. A minute ant, TL 1.4-1.5 mm. Firstreport from Tanzania; two findings - one specimen on  V. nilotica(Tree 5/64) and one specimenon  Grewiasp.   Polyrhachis mkomzaiae sp. nov.Single finding of two specimenson  T. brownii(Tree 3/68). Possibly, the  P. cubaensisMayrlisted by ROBERTSON (1999). See the species description (above).   Polyrhachis schistacea(Gerstäcker, 1859);  FOCOL2576. A large ant, TL 9.3-13.7 mm. Common pan-African savannah species; ground nesting but known to forage on bushes and to tend homoptera (ROBERTSON, 1999) Two findings; one on  V. nilotica(Tree 5/64), 8 specimens; one on  V. zanzibarica(Tree 5/28), 10 specimens.   Polyrhachis viscosaF. Smith, 1858; CASENT0903462. A medium-sized ant, TL 5.9-7.6 mm. Common pan-African savannah species; ground-nesting but known to forage on trees and bushes. ROBERTSON (1999) reported it from Mkomazi woodland. Six findings all with single fig.s for specimens; two on  V. nilotica(Trees 5/63 & 5/64); two on  C. molle(Trees 3/64 & 3/65); one on  L. schweinfurthii(Tree 3/67); and, two on  T. brownii(Tree 3/68). Tanzania Single First River Ramisi 30 31 1 [471,674,189,219] Kenya First Type Mbuyuni 31 32 2 holotype FOCOL 31 32 FOCOL2576 8