ASHMEAD : CLASSIFICATION OF THE CHALCID FLIES 243 



4. Abdomen with the hind margin of the first dorsal segment (or its flap) incised at the middle 6 



Abdomen with the hind margin of the first dorsal segment straight, not incised. 



Monodontomerus Westwood (type M. obscurus Westw.). 



5. Funicle with 6 joints ; head smooth or at most with sparse punctures 6 



Funicle with 7 joints ; head and thorax with large, thimhle-like punctures. 



Hind femora with a single tooth beneath towards apex Diamoms Walker 



(type Ihrymus armatus Boheman). 



Hind femora with two teeth beneath toward apex Physothorax Mayr 



(type Diamorus variabilis Mayr 9, Physothorax disciger Mayrcj^). 



6. Thorax delicately shagreened ; hind femora with a single indistinct tooth beneath towards apex. 



Plesiostigma Mayr (type P. bicolor Mayr). 



7. Eyes bare ; abdomen with the hind margin of the first dorsal segment incised ; hind femora usually ser 



rate or with one or two teeth beneath towards apex 8 



Eyes hairy ; abdomen with the hind margin of the first dorsal segment straight, not incised ; hind 

 femora sometimes without a tooth Oligosthenus Forster (type Ichneumon stigma Fabr... 



8. Front femora much swollen, the pronotum longer than the mesonotum ; antennae with tivo ring-joints. 



Plesiostigmodes Ashmead, g. nov. (type P. brasiliensis Ashm.). 

 Front femora normal, the pronotum shorter than the mesonotum ; antennse with one ring-joint. 



Hind femora serrate and usually with one tooth beneath ; stigmal vein short but distinct, the 



knob always petiolate ; thorax without thimble-like punctures Cryptopristus Forster 



(type Torymus caliginosus Walk.). 

 Hind femora feebly serrate beneath without a tooth ; stigmal knob sessile, the stigmal vein not 



developed ; thorax with small, thimble-like punctures Hemitorymus Ashmead, g. nov. 



(type H. thoracicus Ashm.). 



9. Apterous or with rudimentary wings 16 



Winged. 



Hind femora beneath towards.apex finely serrate and usuallj' also with one or two teeth. ... 13 

 Hind femora bei>eath smooth with one large tooth some distajice from the apex 10 



10. Scutellum without a cross-furrow before apex 11 



Scutellum with a cross-furrow before apex 12 



11. Stigmal vein very short ; abdomen concave above Holaspis Mayr. 



Stigmal vein not short, oblique ; abdomen not concave above Websterellus Ashmead. 



12. Hind margin of the first dorsal segment incised at the middle ' 13 



Hind margin of the first dorsal segment straight, not incised at the middle. 



Monodontomerus Westwoud. 



13. Head smooth, or at the most with sparse punctures ; funicle 6-jointed 14 



Head and thorax with rather large, thimble-like punctures. 



Hind femora with a single large tooth ; stigmal vein not short, the knob moderately large ; hind 

 tarsi vei-y long, the first joint long Diamorus Walker. 



Hind femora with two rather small teeth (normal form) ; stigmal vein very short, tlie knob very 

 small ; hind tarsi not especially long, the first joint not longer than 2 and 3 united. 



Physothorax Mayr. 



14. Eyes bare ; hind margin of first abdominal segment usually incised medially 15 



Eyes hairy ; hind margin of the first abdominal segment straight, not incised ; hind femora usually 



without a tooth Oligosthenus Forster. 



