RHAGOLETIS.—POLIONOTA. 409 
convex, shining black, all the segments with a narrow white hind-border ; ovipositor long, its first joint 
conical, shining black, the second cylindrical, brown, the third lanceolate, very pointed, rufous. Legs 
rather stout ; the coxse, femora, and hind tibie black; tips of the femora and the front and middle tibic 
rufous; tarsi pale rufous. Halteres yellowish. Wings whitish-hyaline, with brown cross-bands. The first 
cross-band is narrow and runs from the humeral cross-vein, through the first and second basal cells to the 
pointed tip of the third basal cell. he second cross-band is broader and runs from the stigma, through 
the discal cell, to the hind margin of the wings; it covers the small cross-vein, and beneath the fifth vein 
is somewhat faded and attenuated, and more or less connected with the following cross-band, which borders 
the posterior cross-vein and at the costa is prolonged to a broad apical border, ending at the tip of the 
fourth vein; in the middle the third cross-band emits a branch in an oblique direction to the end of the 
posterior margin. The third and fourth veins are nearly straight and parallel. The small cross-vein 
is on the midddle of the discal cell. 
Hab. Mexico, Amula in Guerrero 6000 feet (H. H. Smith). 
A single female specimen. In the coloration of the wings and the markings of 
the body this species agrees with Trypeta cingulata, Low, T. tabellaria, Fitch, and 
T. pomonella, Walsh, which Low (Monogr. Dipt. N. Amer. ili. pp. 263-267) has 
referred to Rhagoletis. I therefore include the allied Mexican form in that genus. 
R. striatella seems to come near the Brazilian Ortalis ochraspis, Wiedem. (Aussereur. 
zweifl. Ins. ii. p. 466), which is probably a Rhagoletis. ‘The two insects indeed may 
prove to be identical, as Wiedemann’s description is quite applicable, with the exception 
of a slight difference in the pattern of the wings, 7. e. the presence in O. ochraspis of a 
small stripe on the costa between the second and third cross-bands. 
POLIONOTA, gen. nov.* 
This generic name is proposed for Acrotora mucida, Gigl.-Tos [Mem. R. Accad. Sci. 
di Torino, ser. 2, xlv. (sep.) p. 58, fig. 21], from Mexico, which does not belong to 
Acrotoxa, Low (Anastrepha, Schin.) (according to the figure of the wing given by the 
author), as it wants the principal character of that genus, viz. the curvature of the end 
of the fourth vein. In its general aspect and the pattern of the wings A. mucida shows 
a relationship with Hexacheta, but having only four bristles on the scutellum it cannot 
be placed there. It seems therefore to require a new genus for its reception, more 
especially as I am acquainted with a second closely allied form. 
Front broader than the eyes; the face perpendicular; the thorax cinereous; the abdomen uniformly shining 
black. Fourth vein not curved at the end. From /exachwta it differs in the pattern of the wings: in 
Hexacheta the subtrigonal costal incision next the stigma reaches with its inferior tip beyond the small 
cross-vein, whilst in Polconota it includes that cross-vein. 
* gwodwds, grey; viros, thorax. 
[Since these pages have been in type, the writer, Herr F. M. van der Wulp, has passed away. The last 
pages of the proof-sheets of the Trypetinw (pp. 401 et seq.) were corrected by him shortly before his death, 
on Nov. 27th. ‘To avoid delay, the figures crowded out of Tab. XII. will be inserted in the text.—Ep.] 
BIOL. CENTR.-AMER., Dipt., Vol. I1., December 1899. 3g 
