ABT. 6 NOTES ON ORIENTAL SAPROMYZID FLIES MALLOCH 45 



37. Basal segment of antenna yellow lunipennis (de Meijere). 



B:sal segment of antenna gray ornatipennis (de Meijere). 



38. A distinct, but short, intraalar bristle present; arista short haired, some- 



times merely pubescent; frons very distinctly longer than wide (Sub- 

 genus Minettioides new.) 39. 



No intra-alar bristle present ; hairing of arista variable ; frons almost in- 

 variably about as wide as long (Subgenus Homoneura van der Wulp)_ 43. 



39. Wings conspicuously browned, most deeply so along costa, the brown color 



gradually decreasing in intensity posteriorly, the cross veins slightly 

 darker than field of wing; brownish testaceous species, without black 

 spots on abdomen; hairs on arista about half as long as width of third 



antennal segment fumipennis (Malloch). 



"Wings not at all browned ; abdomen with at least one pair of black spots 

 near apex ; hairs on arista not nearly half as long as width of third 

 antennal segment 40. 



40. Species with at most two pairs of black abdominal spots 41. 



Species with at least three pairs of black abdominal spots 42. 



41. Slender species, with the frons a little over 1.5 as long as wide at anterior 



margin ; face almost flat ; thorax entirely testaceous ; hypopygium as 



Figure 50 parvinotata (de Meijere). 



Robust species, with the frons fully twice as long as wide at anterior mar- 

 gin ; face distinctly elevated just above mouth ; sternopleura largely 

 fuscous . crassiiiscula (de Meijere). 



42. Fore femur without anteroventral comb Samoan sp. 1.' 



Fore femur with anteroventral comb Samoan sp. 2.' 



43. Arista pubescent, the hairs much shorter than half the width of third 



antennal segment; wings without dark markings even at base; halteres 

 pale (cf. irifasciata, 77) 44. 



Arista as above ; halteres fuscous ; glossy black sijecies with two pairs ol 

 acrostichals Samoan sp. 3. 



Arista with very conspicous hairs, if short haired the wings are marked- 54. 



44. Black species, with, or without, a small proportion of yellow or whitish 



color on some part of the body, the abdomen always entirely black 45. 



Yellow species, thorax sometimes grayish, abdomen yellow, with one or two 

 pairs of black dorsal spots, and sometimes dark fasciae on tergites 48. 



45. Scutellum fuscous, apex conspicuously gray dusted. 



piliseta, new name (=pubiseta (de Meijere), not Kertesz). 

 Scutellum uniformly brownish gray dusted 46. 



46. Ocellar bristles a little longer than anterior orbitals ; species not over 2 mm. 



in length, with frons dull sulphur-yellow on interfrontalia above, and on 

 entire width in front of anterior orbitals ; wings narrower than usual, 

 outer cross vein at about its own length from apsx of fifth vein. 



exigua (de Meijere). 



Ocellar bristles much shorter and weaker than anterior orbitals ; species at 



least 3 mm. in length ; frons brownish centrally ; outer cross vein at 



much less than its own length from apex of fifth vein 47. 



47. Species 3 mm. in length ; orbital stripes dull, densely pale gray dusted, each 



at upper bristle not over one-third as wide as interfrontalia at same 

 point coffeata (de Meijere). 



' These species from Samoa included lu this key to show their relationships, were 

 received from Dr. P. A. Buxton. They will be described elsewhere. 



