398 Professor Williston on, the 



lower margin of the eye with wrinkles or rugosities. Thorax deep 

 shining black, smooth ; scutellum concolorous. Abdomen black, 

 less shining than the thorax, finely scrobiculate under high magnifi- 

 cation ; first and fifth segments very short, scarcely visible, the 

 second and third of nearly equal length, the fourth longer than the 

 third ; the abdomen is elongate, oval in shape, and is much 

 flattened. Legs black ; the tip of the four posterior tibiae, the 

 first two joints of the front tarsi, and the first three joints of the 

 other tarsi light-yellow, "Wings tinged with brown ; third section 

 of the costal vein less than half the length of the second section. 

 Length 2| mm. 



Two specimens. St. Vincent. The species seems to 

 be a typical Arthyroglossa. 



Hbcamede. 



Haliday, Annals Nat. Hist., iii., 224, 1839. 



1. Hecamede abdominalis, n. sp. 



cJ. Front opaque brown, the frontal lunule whitish. Antennoe 

 black, the first two joints whitish above ; third joint orbicular. 

 Face brown on the upper part, the lower portion, the cheeks and 

 the posterior orbits silvery-grey ; the orbital space, bounded by 

 the curved line, exceedingly narrow above, becoming broad below 

 the eyes ; near this line on either side below there are two mode- 

 rately strong bristles ; face in the middle strongly carinate, or sub- 

 tuberculate ; clypeus projecting, of the colour of the lower part of 

 the face. Mesouotum, scutellum, and upper part of the pleurte 

 opaque dark- brown ; a narrow stripe just above the dorso-pleural 

 suture, to the root of the wings, silvery-grey ; lower part of the 

 pleura and the metanotum grey, all opaque. Abdomen broadly 

 oval, the first and fifth segments concealed, the fourth long ; 

 opaque silvery grey, the second segment more or less brownish- 

 grey. Legs black ; all the tarsi, except the terminal joint, yellow. 

 Wings whitish ; third section of the costa about half the length of 

 the second section. Length Hmm. 



Five specimens. St. Vincent. Because of the narrow- 

 ness of the first and fifth segments, the abdomen appears 

 to be composed of but three segments, the chief charac- 

 teristic of Trimerina. However, the same character 

 appears in some of the species placed under Hecamede, 

 and while the colorational differences from the known 

 species of Trimerina are marked, they very closely 



