ASHMEAI) : CLASSIKirATION OV TIIK ClIAI.cni) FLIKS 425 



41. Alidomen in ? long, fusiforinly pointed, longer than tlic licml ami thorax united, the petiole very 



sliort, wider than long, in c^ not longer than the thorax, the petiole thrice as long as thick. 



S. miilleri. 



Abdomen in + fusifonn, but not longer lliau the head and tliorax united, the petiole nearly thrice as 



thick, in z? oblong-oval "S howardi. 



42. Front fiice of pronotum immaculate "13 



Front face of pronotum with a median black si>ot. 



Mesopleura entirely yellow ; r^ ''^- iiiiill''ri- 



43. Hindeoxae with a black spot at ba<e6cnraY/i,- niesupleural furrow and aspot on each side of the nut;iiio- 



tuin black; abdomen fusiform, more or less reddish, the dor-sal segments banded with black oi- 

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



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



Middle mesothoracic lobe not so marked. 



Middle mesothoracic lobe ivilh a central black line its entire lenglli 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 scutelluui 64 



45. Parapsidal furrows or sutures not black >">■* 



Parapsidal furrows or sutures black. 



Hind coxiB immaculate or with only a l)lack spot above, or the extreme apex black, never 



striped longitudinally with black -l" 



Hind coxaj striped longitudinally with black ■i" 



4(). Hind coxai with a black stripe both above and beneath : mctatliorax witli a central black spot ; abdo- 

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



tjjielj S. insularis. 



Hind coxic with a black stripe above only ; metathorax dusky medially ; al)doraen conically produced, 

 the dorsum banded with black, the petiole not quite twice as long as thick J5. trinidademix. 



47. Hind coxie immaculate except sometimes at apex '^^ 



Hind coxse with a large black spot above. 



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

 row black ; body of abdomen subglobose : faintly bande<l, the petiole about thrice as long as 

 tlijck >S'. incongrva. 



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

 lanceolate, much longer than the head and thorax united, llic petiole \ery short, transverse. 



.S'. mayri. 



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



Mesopleura immaculate •''•' 



4i). Hind femora maculate "''" 



Hind femora immaculate ''■' 



50. The central black line on 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> spot at apex beneath black ; abdomen conic-ovate, the petiole more than thri.e 

 longer than thick. 



Hind tibia; xvithoul a median black ban.l «. limida. 



Hind tibiic with a median black band ''^^- l>i""n,ilata. 



