TllICONDYLA. 



279 



This species varies a good deal in the excavation and striation 

 of the head, the length of the narrowed part of the pronotum, 



Fig. 123. — Tricondyla macrodera. 



and the length, gibbosity, and sculpture of the elytra ; the apical 

 portion of the latter is usually almost smooth and impimctate r 

 but in the specimens before me from North Cachar it is plainly 

 sculptured to the apex. 



57. Tricondyla cyanea, Dej., var. annulicornis, ScJim.-Goeb. 



Tricondyla cyanea, Dejean, Spec. Col. i, 1825, p. 161. 

 Tricondyla annulicornis, Schmidt-Goebel, Faun. Col. Birm. 1846, 

 p. 10. 



Tricondyla yibba, Chaudoir, Bull. Soc. Moscou, 1861, p. 353* 



Black or bluish, with the femora, except apex, red and the tibiae 

 and tarsi black with a blue reflection ; head strongly excavate, 

 with the orbital striae well marked ; antennae with the 3rd and 

 4th joints ringed with red, palpi nigro-cyaneous ; pronotum convex T 

 rather abruptly narrowed before the anterior constriction, not 

 widened in the middle and almost cylindrical, smooth and glabrous, 

 with a fine central line ; elytra widened and strongly gibbose 

 behind, more or less distinctly plicate transversely before the 

 middle, rather strongly punctured in the middle, and much more 

 finely and sparingly behind. 



Length 19 millim. 



Burma ; Tenasseuim ; Siam ; Cambodia. 



There are several races of this species, which appears to be very 

 variable ; the one above described, which is the only one found 

 within our limits, is longer in form than the rest, and differs also 

 in the more gibbose hind portion of the elytra, the longer and 

 narrower pronotum, and the somewhat smaller head and flatter 

 eyes. 



