62 stkaxiomyid.t;. 



forming an apical style, with or without a minute terminal bristle 

 (fig. 2). Thorax subquadrate or oblong ; scutellum with two 

 spines. Abdomen 5-segmented in 6 , 0- or 7-segmented in 5 , 

 normally barely broader, sometimes much broader than thorax, 

 generally nearly bare ; genitalia small. Le(/s simple. Witigs of 

 normal Stratiomyid type; anterior veins crowded together; Ist 

 and 2nd veins almost anastomosed, rather short, 3rd vein normally 

 forked, botli branches ending far before wing-tip ; 4th vein with 

 three endings, of which one or more may be incomplete or absent ; 

 posterior cross-vein present ; squamse distinct, thoracic pair 

 pubescent. 



llange. World-wide. 



Life-history. One or two European species have' been bred, and 

 O. cyanea at Pusa. Larva much as in Slratiomi/ia, but without 

 s|)ine-shaped protuberance. The imagines occur in moist situa- 

 tions, with a partiality for settling on tJmbellifei'se. 



Table of Species. 



1. iShiuing' metallic-blue species (with a general 



resemblance to the Muscid, Chrysumyia 



du.v) cyaiica, sp. n., p. (i-J. 



Never metallic ; always yellow or brownish, 

 with markings 1'. 



2. Abdomen as well as thorax conspicuously [p. 04. 



pubescent nfoahdominalis, Urun., 



Abdomen practicall}^ bare, normal ; thorax 

 generally considerably pubescent 3. 



3. Thorax with sharply defined spaces of shin- 



ing black and reddish brown, and a short 

 golden tomentose stripe from anterior 

 margin ; a conspicuous and rather ab- [p. 6">. 



normal species. . , ]>ukherriiiia, sp. n., 



Thorax dark, with yellowish or grey pubes- 

 cence ; species of normal appearance .... 4. 



4. Some of the feniura with distinct broad black 



bands *"). 



No distinct femornl bands, legs generally 



wholly pale 6. 



/>. All femora with broad black median band ; 



hii d tibijB with broad apical band minufa, F., p. 65. 



Hind femora not banded ' ruhrithorax, Macq., 



(5. (a) Abdomen wholly orange ; postocular [p. <»7. 



orbits in $ moderately broad luUdins, Walk., p. 70. 



{!>) Abdomen with distinct dark transverse 

 bands ; postocular orbits in $ mode- 

 rately broad transversa, sp. n., p. 71 . 



(c) Abdomen with dorsal row of spots, more 



or less forming a median stripe .... 7. 

 7. Frons in cJ black ; facial bump small, 



blackish ; postocular orbits in 5 mode- [p. <)7. 



rately broad lashmiremis, sp. n., 



