604: 



PROCEEDINGS OF THE NATIONAL MUSEUM. 



vol. 48. 



abdominal segments. Segment 7 is apically colored like the segments 

 following it, and on its sides the pale colors extend almost or quite to 

 its base. 



Of the total number of this species before me 3 have one mesotho- 

 racic horn incomplete or wanting. The last postnodals of 8 speci- 

 mens were examined; in the front wing the last postnodal was con- 

 tinuous in 6 cases, not continuous in 10; in the hind wing, continuous 

 in 3 cases, not continuous in 13 cases. The type is a male in mv 

 collection. 



Paratype— Cat. Xo. 18064, U.S.X.M. Four of the males from 

 Cuniuto, Trinidad, mentioned above, two of which were collected on 

 March 8 and the other two on March 10. 



METALEPTOBASIS (?), species. 



In the tabulations which follow, a female probably belonging to 

 Metal eptoba sis is described. I believe this specimen represents an 

 unnamed species, but, in so far as its association with the proper male 

 of possibly several closely related species may be difficult, and as 

 apparently in this genus males are more frequently taken than 

 females, to name this species at this time might result in delay, annoy- 

 ance, and possible confusion for subsequent authors. The specimen 

 was taken in swampy woods near Rockstone, British Guiana, January 

 30, 1912. 



Comparison of characters of species in the genus MetaleptobasU. 



1 

 j^m„ ™„i« brysonima, 



mauritia, male. 



manicaria, male. 



sp., female. 



Length of 

 abdomen 

 (mm.). 



37 



34 



37 (Trinidad). 



41 (British Guiana) 



37 



33 



Length 

 of hind 

 wing 

 (mm.). 



22 



20.5 



22 (Trinidad). 



24 (British Guiana) 



21 



21 



Labium 



Pale flesh: cleft in 

 median lobe 

 wide, U-shaped, 

 with sides of 

 cleft not paral- 

 lel. 



Flesh colored; 

 cleft in me- 

 dian lobe 

 half as wide 

 as in boviUa, 

 sides paral- 

 lel. 



Pale flesb; cleft in 

 median lobe in- 

 termediate in 

 width with two 

 preceding spe- 

 cies, cleft widest 

 near the middle, 

 sides not paral- 

 lel. 



Same as mauri- 

 tia. 



Pale flesh; cleft 

 in median lobe 

 short, wide, 

 and rounded. 



Labrum . . . 



5 - ~—r ;l;:k. 



Light reddish 

 brown, dark- 

 er basally 

 and laterally. 



Brown, paler ba- 

 sally, lateral 

 margins darker. 



Pattern similar 

 to mauritia 

 but central 

 area greenish 

 brown. 



Shining black. 



Rhinarium. 



Ultra asb gray, 

 with a basal 

 dark spot on 

 either side of 

 median line. 



Very light 

 brown with 

 a dark spot 

 on either 

 side of me- 

 dian line. 



Pale dull blue 

 green with a 

 dark spot on 

 either side of 

 median line. 



Similar to mau- 

 ritia. 



Black. 



