MANN: ANTS OF THE BRITISH SOLOMON ISLANDS. 



313 



Fig. 18. — Pheidole isis 

 Maan. Soldier. 

 Dorsal view of 

 thorax and petiole. 



I 



L 



Sparse erect hairs on head, body, and appendages. 



Head and mandibles liglit brownish red; thorax, epinotum, petiole, and 

 postpetiolc vcrj' dark reddish brown, almost black. First gastric segment 

 brownish yellow, with the posterior border and the remainder of gaster the 

 same color as thorax. Appendages brownish yellow. 



Worker. Length 1.40 mm. 



Head a little longer than broad, sides slightly 

 convex, posterior border feebly concave at middle. 

 Frontal carinae short. Antennal scapes barely sur- 

 passing occipital corners; funicular joints two to eight 

 transverse. Promesonotum rather flat. Pronotal 

 spines extending outward and forward, a Uttle less 

 than half as long as their distance apart at base. 

 Epinotum flat basally; spines extending upward and 

 backward and very slightlj- curved, neai'ly twice as 

 long as their distance apart at base. Petiole triangu- 

 lar in profile, upper border notched at middle. Post- 

 petiole one and a third times as broad as petiole, 

 evenly rounded at sides, with straight anterior and 

 posterior borders. 



Opaque. Head, thorax, and abdomen regularly, 

 densely, and granuloselj' punctate, the gagter more 



subtly than the rest; head with sparse striae on front and vertex and 

 indistinct reticulate striae on occiput. 



Hairs sparse, semirecumbent, with a few erect on head and thorax. 



Head light reddish brown. Thorax, petiole, and postpetiole very dark 

 brown. Gaster and legs brownish yellow. 



Female (dealated). Length 3 mm. 



Head similar to that of soldier, but broader, with less prominent occipital 

 corners and less emarginate behind. Pronotum with bluntly conical spines. 

 Epinotal spines stout, about as long as their distance apart at base. Petiole 

 shorter than in soldier. Postpetiole broadest in front and subconate. 



Head with sculpture similar to that of soldier. ^lesothorax irregularly 

 striate longitudinally and densety punctate. S^utellum more finely striate 

 and punctate. Petiole, postpetiole, first gastric segment, and posterior 

 portions of remaining segments densely granulosely punctate. 



Pilositj' as in soldier. 



Color brownish red, with the pronotum, scutellum, a large quadrangular 

 blotch on mesonotmn, thoracic pleurae, petiole, postpetiole, base and apical 

 border of first gastric segment, and the rest of gaster fuscous. Legs brownish 

 yellow. 



Ysabel : Fulakora. 



