PTECTICUS.— EHAPHIOCEEA. 25 



somewhat more yellowish. Legs, including the anterior coxae, brownish-yellow ; front 

 tarsi infuscated from the tip of the first joint, the middle and hind tarsi from the tip of 

 the second ; all the tibiae beset with a fine, appressed, fulvous pubescence ; hind tibiae 

 slightly infuscated on their proximal half. Halteres yellow. Abdomen brown, with 

 a distinct violet-metallic reflection ; hind margins of the segments yellow, beset with a 

 golden-fulvous pubescence ; segment 2 is yellow, with only a narrow violet-brown strip 

 anteriorly; on segments 3 and 4 the yellow occupies a little less than half of the 

 surface in the middle, and a little more than half on the sides ; on segments 5 and 6 

 the yellow border is narrower ; male forceps brownish-yellow, its palpi-like appendages 

 brown. Wings with a pale brownish tinge; the antero-proximal region, especially 

 between the discal cell and the anterior margin, yellow, the veins in this part also 

 partaking of that colour. A single male. 



The characteristic thumb-like projection of the second antennal joint on the inner 

 side of the third exists here, although in a lesser degree than in other species. 

 P. Jiglinus belongs to a type of structure different from P. testaceus ; the thorax and 

 abdomen are comparatively more slender, the abdomen more convex, and the head (seen 

 from above) is more rounded in front. The venation is, in the main, the same ; but 

 the branch of the third vein is more oblique. The American species differ from the 

 Asiatic ones (Ptecticus repensans, Walk., P. remeans, Walk., and P. leoninus, Bond., all 

 from the Indo-Malay Archipelago) in the shape of the small marginal cell (included 

 between the end of the first vein and the second) : in the Asiatic species this cell is broad, 

 triangular, and the anterior cross-vein coincides with the apex of the triangle, that is, 

 with the bifurcation of the second and third veins; in the two above-mentioned 

 American species this cell is very narrow, linear; the small cross- vein is sometimes 

 before the bifurcation, but in P. testaceus, however, it is behind it. I have verified these 

 statements on many species in the Berlin Museum. 



EHAPHIOCERA. 



Raphiocera, tyCacquart, H. N. Dipt. i. p. 253 (1834) . 



l. Rhaphiocera pampinus, sp. n., s . 



Thorax green, with black stripes ; wings hyaline, with a grey shadow on the apex, and a brown stigma ; legs 



black, except the base of the femora and the first joint of the tarsi, which are white. 

 Length 7-8 millim. 



Hab. Panama, Volcan de Ohiriqui 3000 to 4000 feet (Champion). 



Male. Antennae black, including the arista ; they are inserted on green ground — that 

 is the face and a broad interval of the front above the antennae are green; the 

 remainder of the front and vertex is black, except a green spot in front of the ocelli ; the 

 posterior orbits of the eyes are green, but the occiput itself is black. Mesonotum black, 

 with two green stripes, abbreviated in front and behind; in front the stripes are interrupted 



biol. CENTE.-AMEK., Dipt., August 1886. e 



