Mr. J. Gould on new Species of Toucans. 183 



radial joints of right palpus, from above and behind ; ft, natural 

 length of spider. 



Fig. 3. Calydna prospieiens, rf : a, spider, from above, enlarged; b, ditto, 

 in profile ; c, caput and falces, from the front ; d, maxillae, labium, 

 and sternum ; e, e', natural length, and spider in outline, of 

 natural size. 



Fig. 4. Salticus volans, rf : a, spider, from above, enlarged ; b, ditto, without 

 legs, showing abdominal flaps folded ; c, ditto, ditto, with flaps 

 extended ; d, abdomen, from beneath, showing underside of ex- 

 tended flaps ; e, natural length of spider. 



Fig. 5, Salticus speciostis, $ : a, spider from above, enlarged ; b, ditto, with- 

 out legs, in profile ; c, underside of abdomen ; d, natural length 

 of spider. 



XXV. — On three new Species of Toucans pertaining to the 

 Genus Aulacorliamplms. By John Gould, F.R.S. &c. 



Tpie remarkable South-American family of Rhamphastidre, 

 or Toucans, of which about six kinds were known to Linnaeus, 

 now amount to over fifty very distinct species, each possessing 

 good and tangible specific characters. The entire family has 

 been subdivided into five groups, to which the following generic 

 appellations have been applied — viz. lihamphastos, Ptero- 

 glossuS) Selenidera } Andigena, and Aulacorhamphus. 



It is to the genus Aulacorhamphus (or little green toucans) 

 that the three new species pertain. They all inhabit the fine 

 countries of Venezuela and Columbia. 



Aulacorhamphus calorhynchus. 



Entire plumage green, with the following exceptions:— above 

 and surrounding the bare space in which the eye is placed 

 bright blue ; throat grey, washed with blue ; tail-feathers 

 green, inclining to blue towards the tips. Bill yellow, with 

 the central portions of both mandibles greenish yellow, bounded 

 behind by a narrow line of white ; bare skin surrounding the 

 eye reddish brown ; legs greenish blue. 



Sexes alike in colour ; female rather smaller than the male. 



Measurements of male — total length 14 inches, wing 5, 

 tail 5, bill 3^, tarsus 1£. 



Hob. Merida. Collected by Mr. Goering. 



This is by far the finest species of the little section of 

 the Rhamphastidee to which it belongs — a section differing 

 from the rest of the green toucans by the tail-feathers being 

 uniform in colour. The present species is altogether larger 

 than the old A. sulcatus, and very different in the marking of 

 its bill. 



