LONGICORN COLEOPTERA FROM BURMA 83 



Antennae of the male about equal in length to the body ; 

 first joint rather short and thick, the third nearly twice as long, 

 the fourth distinctly shorter than the third, the fifth and follow- 

 ing subequal among themselves , each very much shorter than 

 the fourth; the third, fourth and fifth with a short thick fringe 

 of hairs underneath. 



The antennae of the female resemble those of the male; but 

 are much shorter ; surpassing by a little only the middle of the 

 elytra. 



The combination of characters above described shows that 

 this genus does not fit well into any of Lacordaire's groups. 

 It is undoubtedly nearly allied to Pemptolasius, to which 1 have 

 already, with some doubt, assigned a position near Ectalosia. 



193. Estigmenida variabilis, sp. n. (PI. I, fig. 13). Rufo-castanea, 

 fere glabra, sat nitida; capite modice punctata, vertice genisque 

 albo-cinereo-vittato; prothorace grosse sat denseque punctata, supina 

 utrinque obsolete cinereo-viltato; elytris dense fortiterque pwictatis, 

 utrisque lineis quatuor elevatis, quarum duabus distinct ioribus; an- 

 tennis articulis 3^ ad 5^"^ nigro-fuscis et subtus breviler denseque 

 nigro-fimbriatis, articulis 6*^ ad 11^"^ tenuibus, plus minusve pal- 

 lide-griseis. Long. 11-13 mm. 



Var. A. Corpore tato eUjtrisque nigris. 



Var. B. Corpore rufo-testaceo; elytris pedibusque flavo-testaceis. 



Garin Mts. (Gheba district); alt. 900-1100 m. 



The resemblance of this species to Estigmena chinensis, Hope 

 — a tolerably common Oriental Hispid — is most striking, and 

 appears to me to be the result of something more than mere 

 accidental causes. Not only are the colours , punctuation , and 

 whole general aspect of two species very much alike; but the 

 antennae of the Longicorn do not show so great a difference 

 from those of the Hispid , as , from their greater length , they 

 might be expected to. This is due to the fact that the last six 

 joints are slender, are mostly of a pale-greyish colour, and are 

 not fringed with hairs like the basal joints, and in consequence 

 are not- so distinctly visible at a short distance. What advantage 

 the Longicorn could derive from thus mimicking the Hispid is 



