A new Sesiid from Sumatra, 



by 

 R. VAN HECKE. 



(PL 9 , Fig. i). 



Mr. P. O. Stolz at Soerian (Alahan Pandjang, Padangsche 

 Bovenlanden) has sent to the Leyden Museum of Natural 

 History a very remarkable, beautiful male Sesiid, captured 

 in the first half of this year. I have vainly looked for a 

 description of an Indo-Australian form like that received 

 from Sumatra and Dr. K. JORDAN, who was kind enough 

 as to compare my description and figure with the species in 

 the collections at Tring, also did not know this interesting 

 form. I now hope, that my meaning, that we have to do 

 here with a new species, represented by only one, though 

 very fine specimen, will prove to be correct. 



As far as I know, the new species must be inserted in 

 the genus Sciapteron Staud. The following characteristics 

 indicate the named genus: the 'tongue tolerably long; palpi 

 erected with black long hairs at the base and yellow hairs 

 on the second joint; the third joint short and sharply pointed, 

 naked. The eyes large, naked, with ocelli; the antennae 

 1 1 1 / 2 mm. long, spindleshaped with short thin hairs at the 

 base. Head, thorax and abdomen 30 mm. long. The anterior 

 wings are scaled ; the posterior ones not, hyaline. The 

 nervature fully agrees with that of Sciapteron tabaniformis 

 ROTT. The tibiae are spined ; the large scales on the thorax 

 and abdomen easily get loose. 



1 think that we have to do with an Indo-Australian 



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