PROC. ENT. SOC. WASH., VOL. 21, NO. 7, OCT., IQIQ 169 



parasidal grooves and broadly depressed posteriorly but without a median 

 dimple-like impression before scutellum; transverse suture between meso- 

 scutum and scutellum crossed by only one carina ; mesopleura smooth, without a 

 distinct impression below the middle ; propodeum polished and glabrous above, 

 more or less weakly sculptured and thickly hairy on the posterior half; pro- 

 podeal spiracles at the anterior end of a distinct shallow depression; abdomen 

 about as long as head and thorax combined, smooth and polished throughout; 

 first tergite strongly bicarinate from base to near apex and distinctly longer 

 than broad; stigma of forewing broad; radial cell terminating some distance 

 before the extreme wing-apex; first radial abscissa equal to about half the 

 width of stigma; second abscissa twice as long as first and a little shorter 

 than the first intercubitus; recurrent vein interstitial; second cubital cell 

 narrowed towards apex; first brachial cell closed. Antennae, head except 

 mouth, mesoscutum, tegulae, legs for the most part, ovipositor sheaths, and 

 the venation, black or blackish; clypeus, mandibles except apex, front coxae, 

 median coxae on inner side, fore and median tarsi except apical joint, pale 

 testaceous; wings uniformly dark fuscous; remainder of thorax and the 

 abdomen very dark reddish testaceous. 



Male. Length 5 mm. In other respects agrees with the description of 

 female. 



Type locality. Trinidad, British West Indies. 



Type. Cat. No 22376, U. S. Nat. Mus. 



Hosts. -Anastrepha striata Schiner and A. serpentina Wiede- 

 mann. 



Described from five females and four males reared in June 

 and July by F. W. Urich, from the two above-named Trypetids. 



This species may be only a geographic race of crawfordi Viereck. 



Opius cereus, new species. 



Runs in the writer's key (1. c.) to category 6 where it disagrees 

 with the first alternate by having the second tergite not striated 

 'and it will not agree with the second alternate, since the wings 

 are hyaline. In Brues and Richardson's key (1. c.) it runs to 

 areolatus Szepligetti and differs from the description of that 

 species mainly in slight color characters. 



Male. -Length 4 mm. Head viewed from above transverse, fully twice 

 as broad as long; frons and vertex polished, rather more than ordinarily 

 hairy, the former with distinct, though small, setigerous punctures; vertex 

 nearly straight, and only slightly elevated above the top of eyes; ocellocular 

 line about three times the diameter of an ocellus; face shining, distinctly 

 hairy, with distinct setigerous punctures and a low broad median ridge; 

 malar space distinctly longer than the width of mandible at base; anterior 

 margin of clypeus sinuate, slightly angulated at the middle and at each 

 lateral angle, separated from the mandibles by a narrow transverse cavity; 



