50 PROCEEDINGS OF THE NATIONAL MUSEUM vol. 7C 



47. Seventh sternite with a lougitudinal, median carina that is bifurcate at 



apex ; spine of eighth stei-nite normal rostrata. 



Seventh stei-nite with simple median carina that does not reach the apex 

 of the sternite; spine of eighth sternite short, straight, and broadly 

 flattened picticollis, 



48. Clypeus wholly or in part black, or bearing a pair of black spots 49. 



Clypeus yellow or pale 52. 



49. Middle metatarsus with a pair of stout spines at its middle point below; 



distal half below somewhat curved megerlei. 



Middle metatarsus not as above 50. 



50. Clypeus and labrum (except lateral margins in some specimens) entirely 



black melanopa. 



Clypeus at most with a pair of black spots ; labrum yellow 51. 



51. Scutum without discal marks; genital stipes as in Figure 98 forcipata. 



Scutum with well-developed discal marks; genital stipes as in Figure 



100 frioensis. 



52. Seventh tergite as in Figure 148 ; genital stipes as in Figure 14T__ochracea. 

 Seventh tergite and genital stipes otherwise 53. 



53. Fascia on second tergite inclosing a pair of black sjwts ; some or all pairs 



of lateral spots on sternites may be connected 54. 



Fascia on second tergite not inclosing black spots ; lateral spots on sfernites 

 not connected 60. 



54. Dorsum and posterior surface of propodeum immaculate ; genital stipes as 



in Figure 91 55. 



Dorsum and posterior surface of propodeum maculated ; genital stipes 

 otherwise 56. 



55. Seventh sternite terminating with a distinct median carina ; fascia on first 



tergite alone interrupted f estiva. 



Seventh sternite terminating with a distinct median notch ; some or all 

 fasciae on tergites (in addition to the first) interrupted muscicapa. 



56. Spine of eighth sternite flattened, resembling a spearhead (fig. 145). 



niponica. 

 Spine of eighth sternite rounded, of normal foi-m 57. 



57. Fascia on first tergite continuous; second sternite with broad apical 



fascia 58. 



Fascia on first tergite interrupted ; second sternite with only lateral spots 

 (that may be connected with apical lines) 59. 



58. Apical segment of antenna flattened and truncate at tip; scutum without 



discal marks flavescens. 



Apical segment of antenna i-ounded at tip; scutum with evident U-shaped 

 discal mark frioensis. 



59. Fasciae on tergites. except on first, continuous connexa. 



Fasciae on tergites all interrupted frioensis. 



60. Narrow longitudinal and transverse discal lines on scutum; fascia on 



scutellum aldabra. 



Above combination of maculations on scutum and scutellum not 

 present qi^ 



61. Flagellum simple, none of its segments spinose or excavated gradilis. 



Flagellum with some of its segments spinose or excavated 62. 



62. Sides of propodeum and thorax (excluding prothorax) black; rarely small 



spot on mesopleura 63. 



Sides of propodeum and thorax with conspicuous maculations 66. 



