452 XEW AND RARE AUSTRALIAN TERMITES, WITH NOTES ON THEIR BIOLOGY, 



slender, scantily setaceous at apex. Clypeus broad, nearly truncate in front. 

 Antennae (Fig. 50) 16-jointed, 4th joint shortest, 5th-13th moniliform, 14th and 

 15th turbinate, 16th .small, broadly oval. Mandibles large with dentition as in 

 large form. 



Pronotum of the same form as large form. 

 Legs as above, but tibia more thickened. 

 Abdomen: Styli present. 

 Measurements : 

 Total length 3.00. 

 Thorax and abdomen, long 2.58. 



Head, base to apex of labrum, long 1.55; wide 0.820; deep 0.517. 

 Antennae (16-jointed) 1.70. 

 Mandibles, long 0.658. 

 Tibia iii. 0.893. 

 Abdomen, wide 0.893. 



W r Ic e r. 



Colour: Cream, with ferrugineous spot at postero-lateral angle of clypeus. 



Head large, rounded behind and on the sides, flattened above, clothed with 

 scattered setae. Labrum large, convex, swollen on the sides, rounded in front. 

 Clypeus large, truncate in front, convex behind, divided medially by a distinct 

 suture. Antennae 17- or 18-jointed, 3rd joint much longer than 2nd, 4tli shortest 

 of all. Mandibles with dentition as in imago. 



Measurenuents : 



Total length 5.50. 



Head, base to apex of labrum, long 1.410. 



Antennae 1.880. 



Affinities: Two species, 7?. reticulatus Froggatt and 7?. intermedins Brauer, 

 from Australia have been described previously. The imago of the new species 

 may be distinguished from the former by its darker colour, narrower head, much 

 larger and more projecting eyes, much larger ocelli, narmw pronotum and 

 greater space between ocelli and eyes. 



Ft. hreinli, n.sp. R. reticulatus Frogg.* 



Length with wings 11.0 11.0 



Width of head 1.410 1.504 



Width of ]ironotuni 1.175 1.265 



Diameter of eyes 0.376 x 0.423 0.282 x 0.329 



The soldiers of these (wo species are very similar, but those of h'. hreinli 

 have darker heads and darker and stouter setae on liead, thorax and abdomen. 



From images collected by me in Northern Territory and identified by Mr. 

 Froggatt as R. intermedins Brauer. and from others from Mt. Tambourine, 

 Queensland, collected and similarly identified by Dr. Mjoberg, R. hreinli is dis- 

 tinguislied, inter alia, by its smaller size and smaller eyes; these two, however, 

 are not conspecific, Dr. Mjoberg's specimens being considciably larger and more 

 robust, and having larger eyes than those from the Northern Territory. Un- 

 fortunately, T have not had for comparison the soldier castes from the same 

 nest series as the imagos in the case of Brauer's species (as identified liy Frog- 

 gatt), but I have compared both fonns of soldiers of 7?. hreinli with specimens 

 from Mackay, Q.. from Mr. Froggatt's collection, and find them to differ marked- 

 ly in the colour and shape of the head. 



*Measurements and other particulars are from co-types from Kalgoorlie, W. 

 Australia. 



