FRUIT FLIES OF THE GENUS DACUS. 103 



15 (14). Facial spots more or less united together towards the middle, forming a 

 transverse band ; abdomen of male reddish behind the middle, with a black longi- 

 tudinal middle stripe ; ovipositor red . . . . . . 9. correctus, nom. n. 



16 (3). Vertical, thoracic and scutellar bristles black ; face of male immaculate ; 

 thorax with a middle longitudinal yellow stripe ; third abdominal segment of male 

 not cihated ; ovipositor very long and thin, black ; wings with a distinct brown 

 spot at lower end of hind cross- vein . . . . . . . • 11. diver sus, Coq. 



17 (2). Three pairs of lower fronto-orbital bristles, the two apical pairs being 

 closely approximated ; all the bristles of head and thorax black. 



18 (19). Reddish species, with entirely yellow scutellum and a middle yellow 

 stripe on thorax ; femora entirely yellow ; wings with the hind cross- vein broadly 

 infuscated and with very broad anal stripe . . . . . . 14. cucurbitae, Coq. 



19 (18). Blackish species, with black or black-spotted scutellum ; femora partly 

 black ; wings wdth the hind cross-vein not infuscated. 



20 (21). Scutellum yellow, with a black terminal spot ; thorax with a middle 

 yellow stripe ; wings \\ith well developed anal streak . . 17. scutellarius, sp. n. 



21 (20). Scutellum black, vdth. a small yellow spot on each side ; no yellow 

 middle stripe on thorax ; wdngs without anal stripe . . 18. biguttatus, sp. n. 



22 (1). Scutellum with two pairs of bristles, the basal and the apical ; all the 

 bristles of the body black. 



23 (30). Only two pairs of lower fronto-orbital bristles. 



24 (25). Wings absolutely •udthout any brown marking at apex or even on anal 

 vein, and without the supernumerary lobe in the male ; face altogether black ; 

 scutellum black, with two broad yellow spots ; third abdominal segment of male 

 cihated . . . . . . . . . . . . . , 19. bipustulatus, Bezzi. 



25 (24). Wings with distinct brown pattern and well developed anal stripe ; 

 face yellow, with black bands or black spots ; scutellum entirely yellow, immaculate. 



26 (27). Thorax reddish ; face with black spots ; third abdominal segment of 

 male not cihated ; \Adngs without supernumerary lobe in the male, and "uith the angle 

 at end of anal cell of equal size in both sexes . . . . . . 16. garciniae, Bezzi. 



27 (26). Thorax black ; third abdominal segment of male cihated ; wings of 

 male with distinct anal lobe and with the usual sexual dimorphism of anal cell. 



28 (29). Face in both sexes with two parallel transverse black bands ; thorax 

 without middle yellow stripe . . . . . . . . . . 10. diqjlicatU'S, sp. u. 



29 (28). Face with the two usual black spots ; thorax with middle yellow stripe 



13. hageni, Meij. 



30 (23). Three pairs of lower fronto-orbital bristles ; yellow middle stripe of 

 thorax always present ; males always with cihated third abdominal segment and 

 with supernumerary anal lobe to the wings. 



31 (34). Scutellum entirely yellow, without any definite black apical spot, or 

 with a less distinct brownish one. 



32 (33). Face with two black spots ; femora yellow ; wings with the brown 

 fore border dilated into a broad spot at end, and with the hind cross-vein hghtly 

 margined with fuscous at lower end . . . . . . . . 15. caudatus, F. 



