2 PEOCEEDI^-GS OF THE iSTATIOITAL MUSEUM vol. 77 



margin ; malar space equal to width of mandible at base ; palpi long 

 and slender, maxillary 6-jointed, labial 4-jointed. Mesoscutum 

 smooth and polished, clothed with pale hairs, without parapsidal 

 grooves and without median fovea or groove posteriorly; transverse 

 groove separating mesoscutum from scutellum divided by three 

 carinae; scutellum smooth, hairy; mesopleuron smooth, without an 

 impression below the middle ; propodeum smooth, with a very stout 

 median keel, and densely clothed with pale hairs ; wing stigma long ; 

 marginal cell extending almost to extreme apex of wing ; first radial 

 abscissa shorter than width of stigma, second one and one-half times 

 as long as first transverse cubitus; recurrent entering first cubital; 

 legs normal. Abdomen as long as head and thorax, ovate, entirely 

 smooth and polished; first tergite with a short longitudinal carina 

 on each side extending from base to near middle, the apical half 

 of tergite perfectly smooth and without carinae; ovipositor sheaths 

 extending about half the length of abdomen beyond its apex. 



Male. — Length, 3.5 to 4 mm. Antennae 40 to 43 jointed, a little 

 longer than in the female; tergites beyond the third more or less 

 blackish. Otherwise like the female. 



Type locality. — Balboa Heights, Panama Canal Zone. 



Type.— Cat. No. 41100, U.S.N.M. 



Described from 11 females (1 type) and 3 males (1 allotype) 

 reared from Anastrepha fraterculus Wiedemann by James Zetek and 

 I. Molino at three different localities in the Panama Canal Zone, as 

 follows : Balboa Heights, August, 1926 (Z-2654) ; Ancon, November, 

 1927 (Z-2911 and Z-2913) ; and Barro Colorado Island, November, 

 1927 (Z-2909). 



i .. OPIUS LECTOIDES, new species 



In the writer's published key to species of North American Opms ^ 

 this runs straight to couplet 22, but is distinguished at once from 

 fusdpennis Gahan by the shorter ovipositor and partly black thorax, 

 while it differs from canaliculatws Gahan by its darker color, more 

 strongly infuscated middle portion of forewing, and slightly differ- 

 ently sculptured first tergite, and by the fact that there are onh'^ 

 three distinct longitudinal carinae in the groove between the meso- 

 scutum and scutellum instead of five as in canaliculatus. It is also 

 very similar to lectus Gahan,* differing only in that the ovipositor 

 is shorter and the groove at base of the scutellum has fewer foveae. 



Female. — Length, 2.4 mm. Head, scape, mandibles, most of the 

 prothorax, mesoscutum, scutellum, axillae, a spot each on meso- 

 pleuron below base of wing, and abdomen dark reddish testaceous; 

 palpi and legs, including all coxae, somewhat paler testaceous; an- 



" Proc. U. S. Nat. Mus., 1915, vol. 49, p. C9. 



* Proc. Ent. Soc. Wash., vol. 21, 1919, p. 167. * 



