20 



MYMARIDAE. 



This interesting- family, of recent years minutely studied by 

 Girault, has been divided into two subfamilies on the number 

 of joints in the tarsi. I do not attach the same importance to 

 this character as to the condition of the alxlomen and thorax 

 an<l consider that allied form are widcdy se])nrated by using- it. 

 The further subdivisions utilized by Aslimead, whereby the gen- 

 era with sessile and subsessile abdomen are grouped together 

 is not natural and the sid)sessile forms shouhl, unless further 

 subdivision is made, be placed with the petiolate ones. If the 

 ]\rymaridae be treated as a mere family in the Chalcid group, 

 the truly sessile forms make the nearest a]i|)roach to thcTricho- 

 grammidae and Eulophidae ( A])helininae). 



I should arrange the grr>u]:)s as follows : 



1 (4) Abdomen sessile, with thoracic jihragma and muscles 



continued into the al)domen Alapticfae 



2 (3) Tarsi five- jointed Alaptinae 



3 (2) Tarsi four-jointed Anagnnae 



4 f 1 ) Abdomen subpetiolate or Dediccllate, with small at- 



tachment to the thorax and without a continuation of 

 the phragma and muscles Mjinuir'ulae 



5 fO) Tarsi, five-jointed Ooctoninae 



(5) Tarsi, four-jointed Mymai'inae 



In many of the sj)ecies with elongate marginal vein, the api- 

 cal portion of this vein is fi-ee from the costa, and is probably 

 in reality the stigmal vein, which nearly continues the marginal 

 in a straight line. 



Goiuitoccrus. 



This genus seems lik(dy to be identical with Section E of 

 Ooctonu9~ of IIali<lay. I have not seen any spcndes of Oocfomis 

 that would be ])laced in his Section A. Oorloihiis australensis 

 deseribed by me, parasitic in the eggs of Tcttifjoiiin in Aus- 

 tralia, is I think congenei-ic with (hmatoccrus ciiujiilatus from 

 the same country and with the American species here described. 

 All these have a distinctly petiolate abdomen, easily seen in 

 dry mounts, but often hard to observe in balsam-mounted ex- 

 amples. The petiole is short and transverse and only slightly 

 longer in my Ooctonus australensis than in the others, quite 



