ART 18 DIPTEEA OR TWO-WINGED FLIES ALDRICH 5 



while the tip of the inverted V is also cDimected on its basal side 

 along the third vein with the yellow of the middle band. The 

 fourth vein curves forward at tip only a very little. 



Length with ovipositor 11.5 mm.; without, 6.75 mm. 



One female, Belize, British Honduras, collector unknown. From 

 the writer's collection, now a part of the United States National 

 Museum. 



Type.— F^m^lQ, Cat. No. 26839, U.S.N.M. 



ANASTREPHA OBSCURA, new species 



Male. — Head, thorax and abdomen yellow, a black spot in ocellar 

 triangle and one just behind the root of the wing on the outer end 

 of the postalar declivity. Mesonotum more reddish-yellow with 

 pale yellow scutellum, and five more or less distinct pale longi- 

 tudinal stripes, the outer including the humeri and notopleural 

 suture. Upper edge of sternopleura and sides of mesonotum also 

 pale. 



Front with two orbitals turned back. Thoracic chaetotaxy as in 

 serpentina Wiedemann. Abdomen unicolorous, the fifth segment not 

 much longer than the fourth. Legs yellow, including the tarsi. 



Wings of very characteristic color, the usual undulating bands 

 obscured by a general brown infuscation, which leaves as subhyaline 

 or distinctly lighter only a triangular spot on the costa beyond the 

 first vein, the anal angle and two triangles on the hind margin, 

 occupying a part of the second and third posterior cells. On exami- 

 nation with a lens there is a rather distinct division in color between 

 the yellow-brown typical pattern and the plain brown obscuration: 

 the outer border of the former crosses the discal cell diagonally be- 

 yond the anterior cross vein, continuing straight on to the third 

 vein and thence along it to the costa, receiving on the way a narrow 

 streak from behind which in its posterior part incloses the hind 

 cross vein. The stigma and the base of the first basal cell and 

 some indefinite expansions from the latter are deeper brown as well 

 as the base of the third posterior cell. The fourth vein curves for- 

 ward at tip as usual, and the first and third veins are setulose. 



Female. — The ovipositor (sixth apparent segment) is about twice 

 as long as the rest of the abdomen, cylindrical or slightly tapering, 

 reddish in color. 



Length of male, 8.5 to 10 mm.; of female, over all, 13.5 to 14,5 

 mm. ; of o'vipositor, 5 to 6.8 mm. 



Described from four males and four females, from Trinidad, West 

 Indies. Three were reared at Maraval, Trinidad, from larvae in 

 Lucuma multifloi'a, the tropical fruit called jacana, by W. Biithn. 

 One pair are deposited in the British Museum. 



rype.— Female, Cat. No. 27246, U.S.N.M. 



