33 



T,6. (^7,) Fourth joint of front tarsi small and short, not differ- 

 ing much from the third, and articulated far from 

 the true apex of the fifth, so that the latter is almost 

 normal being- only slightly produced beneath in 

 front of its articulation with the fourth. 



37. (38) Maxillary palpi 4-jointed, labial palpi 2-jointed, man- 



dibles 3-dentate (sec. Ashmead Mon. Proct.) 



Aihtcon Jur. 



38. {2)7) Maxillary palpi 6-jointed, labial palpi 3-jointed, man- 



dibles 4-dentate. 



39 (40) Antennal joints widening more or less towards the 

 apex of the antennae; propodeum bounded by a 

 raised line at the truncature and with a definite 

 median area on its posterior face Pvosantcon. 



40- (39) Antennae simply filiform, not at all widening towards 

 apex; propodeum without the above characters. . . . 

 Parantcon. 



41. (i) Tarsi of front legs simple, not chelate. 



42. (43) Apterous ; maxillary palpi 4-jointed (sec. Ashmead 



Mon. Proct.) Mystrophorus Forst. 



43. (42) Winged; maxillary, palpi 5-jointed (sec. Ashmead 



Mon. Proct.) Aphclopns Dalm 



Males. 



1. (14) Stigma not large and ovate or subovate, but narrow 



lanceolate; mandibles with three teeth. 



2. (5) Maxillary palpi very short and inconspicuous, labial 



palpi two-jointed. 



3. (4) Antennae sometimes long, but never extremely thin 



and filiform; the head not incrassate 



Gonatopits (and most of the allied genera). 



4. (3) Antennae extremely thin and long, the head incras- 



sate Echthrodelphax. 



5. (2) Maxillar\' palpi long and conspicuous, reaching at least 



to the posterior margin of the head, if laid straight 

 back; labial palpi three-jointed. 



6. (g) Ocelli in a slightly curved line on the vertex, the front 



ocellus, at most, a very little in front of the posterior 

 pair. 



