ASHMEAD : CLASSIFICATION OF THE CHALCID FLIES 425 



41. Abdomen in 9 long, fusiformly pointed, longer than the head and thorax united, the petiole very 



short, wider than long, in (^ not longer than the thorax, the petiole thrice as long as thick. 



S. miilleri. 



Abdomen in 9 fusiform, but not longer than the head and thorax united, the petiole nearly thrice as 



thick, in c? oblong-oval S howardi. 



42. Front face of pronotum immaculate 43 



Front face of pronotum with a median black spot. 



Mesopleura entirely yellow ; cJ^ S. mulleri. 



43. Hindcox£e with a black spot at base beneath; mesopleural furrow and a spot on each side of the metano- 



tum black ; abdomen fusiform, more or less reddish, the dorsal segments banded with black or 

 fuscous, the petiole black and about thrice as long as thick S. howardi. 



44. Middle mesothoracic lobe with a small central black spot or with two black spots anteriorly 80 



Middle mesothoracic lobe not so marked. 



Middle mesothoracic lobe with a central black line its entire length or nearly so 45 



Middle mesothoracic lobe without a central black line, but with two lines anteriorly, or these 

 lines are united and form a loop, which is sometimes connected with a short median black 

 line from the base of the scutellum 64 



45. Parapsidal furrows or sutures not black 54 



Parapsidal furrows or sutures black. 



Hind coxae immaculate or with only a black spot above, or the extreme apex black, never 



striped longitudinally with black 47 



Hind coxae striped longitudinally with black 46 



46. Hind coxae with a black stripe both above and beneath : metathorax with a central black spot ; abdo- 



men subglobose, banded with black or fuscous above, the petiole a little more than twice longer than 



thick ■ S. insularis. 



Hind coxae with a black stripe above only ; metathorax dusky medially ; abdomen conically produced, 

 the dorsum banded with black, the petiole not quite twice as long as thick 5'. trinidadensis. 



47. Hind coxae immaculate except sometimes at apex 48 



Hind coxae with a large black spot above. 



Hind femora with two black spots, one near the middle and one at the apex ; mesopleural fur- 

 row black ; body of abdomen subglobose ; faintly banded, the petiole about thrice as long as 

 thick S. incongrva. 



Hind femora immaculate ; a small spot on each lateral mesothoracic lobe ; abdomen elongate 

 lanceolate, much longer than the head and thorax united, the petiole very short, transverse. 



S. mayri. 



48. Mesopleura marked with black ; middle mesothoracic lobe with a central black line 49 



Mesopleura immaculate 53 



49. Hind femora maculate 50 



Hind femora immaculate 52 



50. The central black line ou the middle mesothoracic lobe not or only slightly dilated at the middle. . . 51 

 The central black line on the middle mesothoracic lobe dilated at the middle ; hind femora with a spot 



at base beneath and a spot at apex beneath black ; abdomen conic-ovate, the petiole more than thrice 

 longer than thick. 



Hind tibiae without a median black band S. timida. 



Hind tibiae with a median black band S. biannulata. 



