2 MEMOIRS OF THE CARNEGIE MUSEUM. 



Harvard University, made chiefly by the Thayer expedition; (b) the collections of 

 Indiana University, made by H. von Ihering in Rio Grande do Sul, by J. D. Anisits 

 in Paraguay, and by Charles Wilson during the Landon-Fisher expedition to 

 Colombia; (c) the collections made under the joint auspices of the Indiana Uni- 

 versity and the Carnegie Museum on the occasion of the author's expedition to 

 British Guiana, and the reconnaissance undertaken by him in Colombia; and (d) 

 the collections made by Mr. John D. Haseman during the expedition of the Carnegie 

 Museum to central South America. The collections made by Mr. Haseman are 

 by far the largest both in the number of specimens and species. An account of 

 Haseman's travels, together with a list of his localities, was published in the Annals 

 of the Carnegie Museum, Vol. VII, p. 287. A map showing his route accompanies 

 the present paper. 



There are twenty-one genera and fifty-six species and varieties of Cheirodontinse 

 now known. ^ In the present paper seven genera and seventeen species for the first 

 time are described. In all I have at one time or another described fourteen genera 

 and thirty-three species. Nineteen of the genera and thirty-nine species are repre- 

 sented in the collections of the Carnegie Museum. In the other museums, so far 

 as known, the species are represented as foUows: 



Paris (Mus6e National) 1 



Vienna (K. K. Hofmuseum) 8 



London (British Museum) 9 



Genoa (Museo Civico) 2 



Copenhagen (Zoologisches Museum) 1 



Cambridge (Mus. Comp. Zoology) 4 



New York (Am. Mus. Nat. History) 1 



Washington (U. S. National Museum) 2 



PUladelphia (Acad. Nat. Sciences) 7 



Bloomington (Indiana University Museum) 35 



Ithaca, N. Y. (Cornell University) 1 



I have examined practically all of the known species except Cheirodon pisciculus 

 from western Chili and Odontostilbe pulchra from Trinidad. However, while pre- 



of the smallest specimen; (e) the locality; and (/) frequently the date of collecting and name of the collector. 

 Where the entire series is reserved for the Carnegie Museum the letters after the current number and the 

 number agree. When specimens have been destroyed by dissection or otherwise, or where there are numerous 

 duplicates, the letters and numbers do not necessarily agree. 



' I have placed the genus Psalidodon in the Tetragonopterince, although it has the single row of notched 

 teeth characteristic of the Cheirodontinse. Psalidodon and Henochilus, in the latter of which there is a double 

 row of teeth in the upper jaw, form a little group bridging the gap between the Tetragonopterinaj and Cheir- 

 dontina;; or, on account of the absence of lips, they may be regarded as forming a little group distinct from either 

 of the above. Megalamphodus ecuadorensis, sp. nov. is described in the Appendix. 



