Occasional Papers of the Museum of Zoology 1 1 



as two spots more or less obscurely joined; these two spots on 

 8 are also present on 7 as a triangular spot just posterior to 

 the basal greenish area with the apex of the spot directed pos- 

 teriorly and an apical, less definitely triangular spot with its 

 apex directed anteriorly ; the homologues of these two spots 

 on 7 form the "bande laterale au 8^" of de Selys, 



Female. — Through the kindness of Mr. Kahl I have had for 

 study, the material in the Carnegie Museum determined by Dr. 

 Calvert as pygmaeus (Bio. Cent. Amer.). The female from 

 Chapada, Brazil, lacking the last seven abdominal segments, 

 which served as the basis for the description of that sex of 

 pygmaeus by Dr. Calvert, is really another and unnamed spe- 

 cies, so that the female of pygmaeus has not hitherto been 

 known. In pygmaeus the brown of the face is much lighter 

 than in the Chapada species ; in the Chapada female the f rons 

 is distinctly angled, the angle being the dividing line between 

 the anterior brown and the dorsal green, in pygmaeus the frons 

 is rounded and low, without a trace of an angle; in the same 

 way the vertex is more flattened in pygmaeus, the postocellary 

 ridge less prominent, and not developed into a more or less 

 median over-hanging plate as in the Chapada female. In the 

 Chapada female the occiput is straight, as described by Cal- 

 vert, while in pygmaeus it is slightly concave, with a small 

 median indentation. In the Chapada female the dorsum of the 

 thorax is distinctly darker than the brown dorsum of pyg- 

 maeus and might be described as black; in pygmaeus the pale 

 dorsal stripes, are as shown for the male (fig. 2) or they may 

 narrow continuously dorsally without any expansion or en- 

 largement at the dorsal end, but in either case they are barely 

 separated from the antealar sinus; in the Chapada female, on 

 the other hand, the dorsal stripes are more yellowish and are 

 much shortened, being separated from the antealar sinus by 



