ASHMEAD : CLASSIFICATION OF THE CHALCID FLIES 423 



duskj' or black, the scutellum entirely yellow ; all legs yellow but the hind coxre above ferruginous 

 or blackish at apex ; abdomen ferruginous, the petiole Ion;;, blackish at base, the body oblong oval, 

 tinged with fuscous or blackish at sides towards apex, S' '*''• chapadw. 



21. Thorax not entirely yellow 22 



Thorax entirely yellow, immaculate 18 



22. Middle mesothoracic lobe yellow with two small black spots or short lines on the anterior margin and 



a black spot posteriorly 7S 



Middle mesothoracic lobe cjuite differently marked 23 



23. Middle mesothoracic lobe with a large triangular black spot, or black with the sides and the base (the 



part near the scutellum) margined with yellow or white (the black sometimes with a yellow central 



spot) 24 



Bliddlc mesothoracic lobe with one or more black lines, or with a central black spot 44 



24. Middle mesothoracic lobe margined with yellow 25 



Middle mesothoracic lobe margined with white. 



Head, except the scrobes and the occiput, the pronotum above, the outer margins of the lateral 

 mesothoracic lobes, two large spots on the scutellum, a line on each side of the" metathorax 



and the front and middle legs white or yellowish-white S. albomaculatii . 



2.5. Hind coxie not mostlj' black, either ferruginous or yellow, but sometimes spotted or striped with black, 



26 

 Hind coxiB nearly wholly black, or at most with a yellowish spot at base abo\e or below ; body of 

 abdomen rufous or pale ferruginous, the petiole yellow. 



Hind coxse black except a spot at base beneath ; mesothoracic lobes mostly red margined with 



yellow ; pleura black, ? S. santarema. 



Hind coxffi black except a spot at base above; mesothoracic lobes black margined with yellow ; 

 abdomen red S. crythrogaster. 



26. Hind coxse striped longitudinally with black or yellow and black 27 



Hind coxse not so marked, at the most with only a black spot, but freiiucntly immaculate, except at the 



extreme apex 28 



27. Lateral mesothoracic lobes along the outer and basal margins yellow ; scutellum black with a yellow 



band across the base, the axilhe wholly yellow, except a delicate black line at base ; hind femora 

 mostly yellow with a leg of mutton shaped black spot extending from the base to near the middle, 

 and a curved black line toward apex ; abdomen black and yellow, the petiole, base of the second, 



third and fourth dorsal segments black, 9 jS. JluvoaxiUaris. 



Lateral mesothoracic lobes with an oblique yellow spot on the outer basal angle ; scutellum with two 

 spots at base and its apex yellow, the axillsB wholly black ; hind femora mostly black marked with 

 yellow at base and above and with a curved yellow line outwardly at apex ; abdomen yellow and 

 black banded, the petiole yellow f S. flavoorbitalis. 



28. All coxie yellow, immaculate, except sometimes the hind coxie at the extreme apex 32 



All coxse not yellow, immaculate, the hind coxae maculate or at least dusky at base or at apex or with 



a large black spot 29 



29. Head not entirely yellow, the occiput and the scrobes, or the middle of the face, black 30 



Head entirely yellow 31 



30. Middle mesothoracic lobe margined with yellow and with a small yellow spot in the black before the 



middle, the lateral lobes margined with yellow outwardly ; scutellum margined all around with yel- 

 low, the axilhe with a yellow spot behind ; dorsum of pronotum yellow with a small black spot on 



