prove Schlechter correct for establishing a separate genus 
—Pachystele—for the plants referable to this species. 
Neokoehleria corydaloides (Arz/.) Garay comb. 
nov. 
Basionym: Rodriguezia corydaloides Krz). in Fedde 
Rep. 25: 24, 1928. . 
Syn. : Scelochilus corydaloides (KKrz].) Garay in Bot. 
Mus. Leafl. Harv. Univ. 18: 208, 1958. 
A re-examination of the type, Buchtien no. 528!, con- 
vinces me that this species is a member of the genus 
Neokoehleria rather than the genus Scelochilus. In floral 
details it is apparently related to MN. equitans Schltr., 
but the plants have no equitant leaves. Neokoehleria 
Rauhu Senghas is also an allied species. 
Rusbyella caespitosa Rolfe in Mem. ‘Torr. Bot. 
Club 6: 122, 1896. 
Syn. : Odontoglossum pusillum C. Schweinf. in Amer. 
Orch. Soc. Bull. 14: 840, 1946. 
An examination of the holotype of both Rusbyella 
caespitosa and Odontoglossum pusillum has shown them 
to be conspecific. The cruciform arrangement of the 
sepals and petals resembles the pattern found in the flow- 
ers of Mesospinidium; the shape of the lip is analagous 
to Solenidium; the structure of the column approaches 
that of Rodrigueziella (Theodorea). 
Oncidium guianense (4ub/.) Garay comb. nov. 
Basionym: Ophrys guianensis Aubl., Hist. Pl. Guiana 
Fr. 2: 86, 1775, based on ‘‘Helleborine 
Solis carnosis, carinatis & falcatis’’, Plum. 
Cat. 9, 1708 and Pl. Amer. ed. Burmann, 
fasc. 8: t. 182, f. 2, 1759. 
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