146 INSECUTOR INSCITI^ MENSTRUUS 



A NEW AMERICAN FRUIT-FLY 



(Diptera; Trypetidce) 

 By frede;rick knab 

 Anastrepha sylvicola, new species. 



Female. Body-color dull ocher-yellow ; bristles dark brown 

 with yellow luster; pubescence yellow. Frons and face un- 

 spotted; three pairs of fronto-orbital bristles; antennae short, 

 their apices not reaching oral margin ; palpi brownish yellow, 

 with short brown bristles. Wings hyaline, with a deep yellow 

 pattern clouded with brown on distal portions ; second basal 

 cell hyaline, a clear streak extending forward from it into 

 first basal cell ; a clear spot beyond apex of first vein and 

 extending from costa to third vein, not continuous with streak 

 in first basal cell ; a yellow mark in the shape of an inverted 

 "V," its inner arm following the posterior crossvein, the outer 

 arm terminating marginally in the second posterior cell, this 

 V-shaped mark broadly separated from the anal streak ; costal 

 region deep yellow, along first vein extending inward to third 

 vein and also occupying basal half of first basal cell. , Halteres 

 brown. Ovipositor long and rather slender, slightly longer 

 than abdomen. Proportions of ovipositor and wing, 1 : 2.3. 

 Length: Body (without ovipositor) about 8 mm., ovipositor 

 3.5 mm., wing 8.5 mm. 



Trinidad, West Indies, June, 1914; a series of 17 specimens 

 of both sexes reared from an unknown fruit found in the 

 forest (F. W. Urich). 



Type : Cat. No. 20025, U. S. Nat. Mus. 



This species resembles Anastrepha fraterculus Wied. in the 

 wing-pattern, which varies in the same manner as in that 

 species. The V-shaped mark is sometimes connected with the 

 large S-shaped streak, although usually free; rarely the clear 

 streak extending forward from the second basal cell is con- 

 fluent with the spot on the costal margin. 



Date of publication, December 31, 1915. 



