igii- 



G. RiCARDO : The Oriental Tahanidae. j6i 



The conformation of the antennae and in particular the hairi- 

 ness of the tibiae as well as the posterior femora might establish 

 this species as a new genus, divided off from the old genus Haema- 

 lopota, which perhaps itself is very little homogeneous. Bigot, 

 Nouv. Archives Mus. d'Hist. Nat. Paris, i8go (3), ii, p. 205. 



The type came from Laos, a district of Siam, and was seen 

 by me in the Paris Museum after my paper on Haematopota had 

 gone to the printers. 



It should go in the table published on p. 114 of the Ann. 

 Mag. Nat. Hist. (7), xviii (August 1906), under the heading " 15", 

 preceding H. lata^ Ricardo, thus :—" Black species, with all the 

 tibiae densely fringed and the posterior femora with white hairs 

 on their lower border." The hind tibiae have a very thick black 

 fringe, and with the white-haired femora should easily distinguish 

 the species. The antennae are long, the first joint being longer 

 than the second and third together and is a little incrassate ; the 

 second is very small, the third rather long and slender. The wings 

 are of the ordinary type and have three distinct rosettes, the 

 apical band reaching across the apex ; the appendix is long. The 

 frontal callus is large, reddish, with the black paired spots above. 

 Ricardo, Ann. Mag. Nat. Hist. (8), i, p. 57. 



UDENOCERA, Ricardo. 



Ann. Mag. Nat. Hist. (7), xiv, p. 352 (1904). 



This genus is nearly related to the two South American genera 

 Diachlorus , Ost. Sack., and Acanthocera^ Macq., and is formed for 

 a species from Ceylon which bears a general resemblance to the 

 latter genus, but is distinguished from it by the absence of a tooth 

 on the third joint of the antennae, which also divides it from 

 Dichelacera , Macq. It is distinguished from Diachlorus b}' the 

 length of the first joint of the antennae, which is nearly as long 

 as the third joint, and by the altogether longer slender antennae, 

 the third joint being cylindrical ; the fore tibiae are neither curved 

 nor broader ; these differences, together with the presence of a 

 tubercular projection situated more than half-way down the face 

 on which the antennae are placed, seem to justify the formation 

 of a new genus. 



Generic characters. — Antennae long, cylindrical, with no tooth 

 or projection on the third joint; the first joint is ([uite two-thirds 

 the length of the third joint, the second more than half as long 

 as the first joint, the third joint has the first division as long as 

 the four last divisions together, the latter being of equal length, 

 with the exception of the last one, which is a little longer, ending 

 in a blunt point ; they are situated on the lower edge of a protu- 

 berant tu])ercle which reaches the eyes on each side and is itself 

 placed more than half-way down the face; the forehead is long, 

 gradually narrowing to the vertex. The ])alpi are Taba)iiis-\\ke in 

 shape, ending in an acute point. The abdomen is long and narrow, 



