BATHYDEXIA.—SCOTIPTERA. | 223 
2. Bathydexia albolineata, sp.n., 3g. ~ 
Blackish ; thoracic dorsum anteriorly with white and black stripes; abdomen shining, rufous-brown ; tarsi on 
the inner side with golden-yellow tomentum ; foot-claws yellow, with black tips. 
Length 12°5 millim. 
Front blackish, on the vertex half as broad as the eyes; frontal band broad, nearly concolorous with the 
lateral portions; face and cheeks dark grey, the oral margin and the lower part of the cheeks somewhat 
brownish-rufous. Antenne brown, inserted below a line drawn through the centre of the eyes ; third joint 
three times as long as the second; arista long, brownish, finely plumose. Proboscis black, as long as the 
head ; palpi rufous,with black hairs towards the tip. Thorax black, before the transverse suture with white 
tomentum and five black stripes—-the two median stripes linear, the others broader than the interspaces, in 
such a manner that the thorax shows four or six white stripes ; scutellum black. Abdomen convex, densely 
covered with black hairs and with macrochete on the hind margins of the second and following segments. 
Legs black ; tibie with scattered bristles; middle and hind tarsi on the inner side with a golden-yellow 
tomentum ; foot-claws and pulvilli elongate, yellow, the claws with a black tip. Tegule blackish-brown. 
Wings brownish ; small cross-vein on the middle of the discal cell; apical cross-vein concave; posterior 
cross-vein straight. . 
Hab. Costa Rica, Rio Sucio (Rogers). 
Two male specimens. 
SCOTIPTERA. 
Scotiptera, Macquart, Dipt. Exot. ii. 3, p. 83 (1843). 
? Sophia, Robineau-Desvoidy, Essai sur les Myodaires, p. 317, pro parte. 
Head hemispherical ; front of the male narrowed behind, but on the vertex nearly half as broad as the eyes, 
that of the female broader than the eyes ; face perpendicular, slightly carinated ; oral margin not promi- 
nent; cheeks broad, their lower portion half as broad as the longitudinal diameter of the eyes ; vibrissal 
swellings nearly parallel, only on their lowest part slightly convergent ; vibrisse inserted at a short dis- 
tance above the oral margin. Eyes bare. Antenne inserted below a line drawn through the centre of the 
eyes, a little shorter than the face; third joint slender, four times as long as the second; arista thickly 
plumose. Proboscis longer than the head, with distinct terminal lips; palpi cylindrical. Abdomen ovate, 
as broad as, or a little broader than, the thorax, with discal and marginal macrochete. Legs slender, 
with short and weak bristles; foot-claws and pulvilli elongate in the male. Wings longer than the 
abdomen ; apical cell opened at a short distance before the wing’s tip ; curvature of the fourth vein angular, 
with a short appendage ; posterior cross-vein beyond the middle between the small cross-vein and the 
curvature of the fourth vein. 
Macquart established Scotiptera for Dexia melaleuca, Wiedem. ; he considered the 
genus Sophia, Rob.-Desv., as synonymical with it, and Sophia punctata, Rob.-Desv., 
though with some doubt, as conspecific with Dexia melaleuca. Robineau-Desvoidy 
gives among the characters of his genus Sophia, that the abdomen inclines to become 
elongate and that the legs are very long ; according to Macquart, the abdomen should 
even be cylindrical. The abdomen of Dexia melaleuca, however, is ovate (though much 
narrower than in Rutilia, the genus which in Macquart’s work immediately precedes 
Scotiptera); as to the legs, they are elongate and slender, though not so strikingly 
long as in some other genera of Dexine. Robineau-Desvoidy seems to have included 
in his genus Sophia some very heterogeneous species (see the author’s observation at 
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