378 MR. Q. D. HAVILAND ON TERMITES. 



almost all build nests of some kind. They inhabit all the warm 

 regions of the earth, and number probably from two to three 

 thousand. 



A Synopsis of the Sections, iased on Characters of the Soldiers. 



A. Pronotum rather large and flat, projecting laterally 



beyond the underparts. 



a. Fungus-growers. Group. 



Antennae of 17 segments, 3rd longer than 



2nd. Labruni with transparent tip bellicosus. 



Antennae of 16 or 17 segments, 3rd shorter 



than 2nd. Labruni with a few bristles . . vulgaris. 



Antennae of 14 or 15 segments, 2nd as long as 

 ■3rd and 4th together incertiis. 



b. A large foramen in tlie front of the head. Labrum 



short Gestroi. 



c. A minute foramen in the front of the head. 



Labrum as long as the toothed mandibles. 



Antennae of 16 or 17 segments tmsutiis. 



Antennae of 13 segments cequalis. 



d. Pronotum half as broad as head, with an anterior 



median spine , planus. 



e. Prouotimi broad, its anterior margin bilobed .... tenuis. 



B. Pronotum small, saddle-shaped, with raised anterior 



lobe and depressed lateral angles. 

 / Mandible with piercing-tip and cutting-margin. 

 Labrum short, but chitiuized. 



Labrum entire. Mandibles with basal portion 



straight dubivs. 



Labrum entire. Mandibles curved even from 



the base stdphureus. 



Labrum entire. Mandibles strong, incurved, 



with or without a strong tooth dentatus. 



Tjabrum lobed. Mandibles curved even from 



the base hilobatus. 



Q. Mandibles long, but without piercing-tip or cutting- 

 margin Labrum small, white, with minute, 

 acute, diverging lobes. 



Left mandible much bent. Abdomen white, nemorosus. 



Mandibles setiform. Abdomen white setiger. 



Mandibles setiform. Abdomen coloured ... . comis. 

 Left mandible much bent. Abdomen coloured, foraminifer. 

 h. Mandibles rudimentary. Head with perforated 

 conical projection. 



Antemige of 14 short segments ^ atripennis. 



