518 TERMITIDES. 



the discal longitudinal vein, and the branches of the longitudinal 

 vein distinct. Length of the body 3 lines ; of the wings 18 lines. 



a. East Indies. From Archdeacon Clerk's collection. 



19. TERMES COSTATUS. 



Ferrugineo-flavus ; caput ovatum, gutta pallida ; prothorax fere 

 semicircularis, capite latins ; abdomen supra nigricans,fasciis 

 flavis ; alee subrufescentes, marginibus obscurioribus. 



Termes costatus, Ramb. Hist. Nat. Ins. Neur. 305, 9. 



" Ferruginous-yellow : head oval, moderately large ; front rather 

 obscure, with a pale dot : ocelli two : antennae with the third joint 

 longer than the following joints ; fourth shortest ; the rest succes- 

 sively increasing in length : maxillary palpi long : first joint of 

 labial palpi very short, last joint longer than the preceding one: 

 prothorax almost semicircular, broader than the head, depressed on 

 each side, slightly notched behind ; anterior angles prominent : ab- 

 domen blackish above; hind borders of segments yellow: wings 

 pale reddish, darker along the hind border especially towards the 

 base, blackish in front, where the two veins are not ramified ; the 

 other veins numerous and distinct ; no perceptible reticulation, but 

 some irregular and indistinct veinlets." 



Cayenne. 



T. costatus P Piceous, pubescent, nearly linear, tawny beneath : 

 head subelliptical, depressed above, with a red dot between the eyes, 

 tawny in front, hardly broader than the thorax : ocelli two, one on 

 each side, far from the eye : antennas tawny, longer than the head : 

 prothorax nearly twice broader than long, straight in front, convex 

 on each side and behind, forming two-thirds of a circle: abdomen 

 not longer than the thorax: legs tawny; fourth joint of the tarsi 

 twice the length of all the other joints: wings nearly hyaline, full 

 twice the length of the body, tawny along the fore border ; costal 

 and subcostal veins ferruginous; the other veins indistinct. Length 

 of the body 7 lines : of the wings 32 lines. 



a, b. British Guiana. Presented by Sir. R. Schomburgk. 



