Vol. XXvii] ENTOMOLOGICAL NEWS. 403 



Neocatolaccus syrphidis new species. 



9. Length, 1.50 mm. Differs from Zatropis dcutcrus Crawford in 

 having the femora concolorous and a transverse carina on the propo- 

 deum at proximal third which forms the caudal margin of a transverse 

 sulcus of some width and which terminates laterad in a fovea at 

 cephalic margin (two-thirds the way over to the spiracle) ; from Z. 

 cattilpae Crawford in having the transverse carina on the propodeum 

 and all the tibiae testaceous ; from Neocatolaccus tylodermae (Ash- 

 mead) in being very much less robust, in lacking the lateral carina on 

 the propodeum, in having the cross-carina abbreviated (ending at the 

 fovea but in the other species much more extended, running caudo- 

 distad from the fovea to nearly over the caudal coxa, hence to a point 

 laterad of the spiracle and far caudad) ; also the spiracular sulcus is 

 complete, distinct (in tylodermae abruptly cut off by the cross-carina) ; 

 from Neocatolaccus nigrocyaneus Ashmead in having all the tibiae tes- 

 taceous, nigrocyaneus is much more robust, lacks a cross-carina on the 

 subglabrous propodeum and the lateral carina (but with a complete 

 spiracular sulcus and a small fovea at cephalic margin half-way to the 

 spiracle from the meson) ; also it bears two caudal tibial spurs. 



Dark metallic green and with the usual flattened setae on the head 

 and thorax; wings hyaline, the venation pale yellow; scape, pedicel (ex- 

 cept above), legs' (except coxae and femora), yellowish brown. Head 

 and thorax finely, densely scaly punctate, the abdomen shining. Pubes- 

 cence very sparse on the scutellum. Funicle I twice longer than wide, 

 longer than the pedicel, 5 subquadrate. Mandibles 4-dentate. Post- 

 marginal vein longer than the stigmal. 



$ . Abdomen narrower, the legs pale except the coxae and the cau- 

 dal femur; the proximal third of the abdomen is yellow (except at ex- 

 treme base and the lateral margins). Antennae with two ring-joints; 

 funicle 6 a half longer than wide, i nearly thrice longer than wide. 

 Mandibles 4-dentate. Antennae yellowish. 



Described from a large series of both sexes reared from a 

 Syrphid pupa, Cocal, Trinidad, British West Indies, July, 1913 

 (F. W. Urich ). 



Types: Catalogue No. 20224, United States National Mu- 

 seum, three pairs on separate tags. 



The genus Zatropis Crawford is probably a synonym of 

 Neocatolaccus which has a very short propodeal neck not a 

 distinct one; the median carina usually dilates at ape\. 

 Zatropis, however, may be distinguished from 

 ii. lacking the cross-carina on the propodetim. N. 

 Ashmead is not described; it is an Italian species. The male 



