Vol. XXvii] ENTOMOLOGICAL NEWS. 2CX) 



six-jointed; labial palpi four-jointed, the two small joints 

 rather stout. Type Polybiapis mimus sp. n. ; also includes P. 

 polybioidcs (Nomada polybioides Ducke), which is much 

 smaller and has less yellow. 



Polybiapis mimus sp. n. 



9- Length a little over 10 mm.; anterior wing 9; black, the pleura 

 and first abdominal segment dark brown ; bright yellow markings as 

 follows; small spot on labrum; mandibles except apex; clypeus except 

 upper margin and very broad side bands ; subquadrate (longer than 

 broad) supraclypeal patch; broad lateral face-marks which narrow 

 above, extending to top of eye; broad band (narrowing above) behind 

 eyes; malar space; two longitudinal distal stripes and obscure lateral 

 (marginal) bands on mesothorax; greater part of tubercles, small spot 

 behind tubercles ; large subtriangular patch on anterior inferior part 

 of pleura ; smaller, more suffused patch on posterior middle of meso- 

 pleura; large area on mesosternum; axillar spots; rather small spots at 

 sides of scutellum ; two transverse marks on postscutellum ; large 

 marks on sides of metathorax ; band along sides of first abdominal seg- 

 ment, and very narrow one (slightly interrupted) on apical margin; 

 narrow bands on second and third segments, and slender ones at sides 

 of fourth and fifth; and two broad bands on venter. 



Pubescence scanty, brownish above, white beneath; eyes greenish; 

 face smooth and polished; antennae entirely black, third joint longer 

 than fourth; vertex coarsely punctured; mesothorax smooth and shin- 

 ing with scattered punctures, and a deep median groove; scutellum 

 flattish, with a median sulcus; tegulae dark reddish, polished with a 

 small yellow spot anteriorly ; wings strongly reddened, though not 

 very dark, the apical region paler; nervures and stigma ferruginous; 

 b. n. meeting t. m. ; coxae with yellow keels, those on middle and hind 

 coxae very large and sharp, the latter black anteriorly; legs suffusedly 

 yellowish in front, mainly dark, brown behind, but the femora with a 

 more or less evident posterior yellow band, very large and distinct on 

 middle femora; tarsi bright ferruginous, middle and hind ones long; 

 abdomen extremely minutely and densely punctured ; sides of apex 

 with black hair, but last segment with a short fringe of silver hair. 



Hob. Corcorado, Rio de Janeiro, Brazil, May 13, 1912 

 (G. E. Bryant; Brit. Museum). This is a beautiful case of 

 "mimicry." 



Odyneropsis batesi sp. n. 



$. Length about n mm.; black, with the sides of face, upper border 

 of prothorax, metathorax except median band, under side of thorax and 

 large part of coxae, more than basal half and sides of first abdominal 



