FAMILY KPllYDRID.E THE SHORE FLIKS 353 



39. Scutellar bristles arising from very strong tubercles; two pairs of 



frontal bristles (12, 74) Gastrops Williston 



Scutellar bristles not arising from strong tubercles, if from weak 

 tubercles there is but one pair of weak frontals 40 



40. Third antenna! segment with the upper apex more or less elongate. ... 41 

 Third antennal segment with the apex rounded 42 



41. Scutellum shining (1, 14, 17) Lytogaster Becker 



Scutellum opaque black or with an opaque black spot on either side 



(26) Hyadina Haliday 



42. With one or two pairs of weak frontals (24, 51) Pelina Haliday 



With one pair of strong and two pairs of weak frontals (20, ,50). 



Glenanthe Haliday 



43. Clypeus prominent 44 



Clypeus concealed 45 



44. Arista with long rays (33, 75) (Edenops Becker 



Arista bare or pubescent (Napaea Desvoidy, preoc) (4, 22, 47, 60) 



Parydra Stenhammer 



45. Arista with long, well separated rays 46 



Arista bare or with the rays short and numerous 47 



46. Pulvilli absent Dimoccenia Cresson 



Pulvilli well developed (23) Coenia Desvoidy 



47. Mesonotum with two or more pairs of dorsocentrals; middle of face 



without a cluster of bristles 48 



Mesonotum with only one pair of dorsocentrals; middle of face with 

 a cluster of bristles on either side; large species (Pogonephydra Hen- 

 del) (70, 76) Cirrula Cresson 



48. Arista minutely pubescent or pectinate on its whole length 50 



Arista with long, abundant rays on the basal half above 49 



49. Third antennal segment bearing a long hair on the outer surface. 



Setacera Cresson 

 Third antennal segment without long hair (11, 55) 'Ephydra Fallen 



50. Sternopleural bristle present; face with bristles 51 



Sternopleural bristle absent; face without bristles (29). 



Psilephydra Hendel 



51. Two pairs of divergent frontals 52 



A single pair of divergent frontals Eustigoptera Cresson 



52. A pair of strong acrosticals nearly opposite the inner ends of the 



suture (43, 78) Scatella Desvoidy 



No strong acrosticals, these all short and continuing in two rows to 

 the scutellum (23) Lamproscatella Hendel 



53. Second antennal segment with an apical spine above 54 



Second antennal segment without apical spine above 55 



* Curran, 1933. Amer. Mus. Novit. No. 682, p. 8. 



