NOTES ON THE INDO-AUSTRALIAN ANTS OF GENUS 
SIMOPONE FOREL ( HYMENOPTERA-FORMICIDAE) 1 
By Robert W. Taylor 
Biological Laboratories, Harvard University 
I recently discussed a Philippine specimen of Simopone which was 
tentatively identified as S. bakeri Menozzi (Taylor, 1965: 6). Sub- 
sequent examination of the bakeri holotype has shown the Philippine 
specimen to be representative of a new species, which is described be- 
low, along with diagnostic notes on the bakeri type. Three species of 
Simopone are now known from the Indo-Australian area. All are 
represented only by their worker holotypes. They are similar in 
habitus, and constitute a compact and undoubtedly closely related 
complex within this predominantly African cerapachyine genus. The 
generic diagnosis presented earlier (Taylor, loc. cit.) needs no mod- 
ification at this point. 
Simopone chapmani sp. n. 
Type locality. Philippine islands: Negros: Horns of Negros, 
3600 ft. The unique worker holotype was collected, presumably in 
rain forest, by the late Dr. James W. Chapman, for whom this 
species is named. 
Type deposition. Museum of Comparative Zoology, Harvard Uni- 
versity (Type No. 31 199). 
Description. Dimensions (in mm) : aggregate total length (TL) 
ca. 5.0; head length at midline (HL) 0.91; maximum head width 
(HW) 0.68; cephalic index (HW X 100/HL) (Cl) 75 ; maxi- 
mum eye diameter 0.30; ocular index (eye diameter X 100/HW) 
(OI) 44; minimum interocular distance 0.34 (1.14 X eye diam- 
eter) ; PW 0.55; WL 1.2; petiolar node length at midline 0.68; 
maximum petiolar node width 0.56; postpetiolar length at midline 
0.64; maximum postpetiolar width 0.61. Generally similar to the 
New Guinean S. gressitti Taylor, and agreeing with its original de- 
scription (Taylor, 1965, Breviora 22 1 : 3), except in the following 
characters : 
Research supported by U. S. National Science Foundation Grant No. GB 
1634. 
The Simopone bakeri Menozzi holotype, discussed here, was generously 
loaned for study by Prof. Dr. Guido Grandi, Istituto di Entomologia. 
Universita degli studi, Bologna, Italy. 
Manuscript received by the editor January 19, 1966. 
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