26 



to the above division is the remarkable new form called Eukoc- 

 bclcia. This might form a separate division, having the chelar 

 c!aw more curved, and armed apparently rather with serrations 

 beneath, than with the ordinary lamellate structures, while the 

 modified fifth tarsal joint also utterly lacks the usual armature 

 and instead of being dilated at the extremity of its process is 

 here narrowed into a curved hook. 



As any one acquainted with the structure of the Dryinida • 

 might guess from the abnormal character of this insect, its hosl 

 is of a very special form, being none other than the anomalous 

 Brnchoniorpha. 



Returning to the three primary divisions, it should be remark- 

 ed that under the first are included all the forms with short, 

 stout front legs and with large ovate stigma to the front wings 

 and all the many species bred are absolutely confined to leaf- 

 hoppers of the Jassid family, whether arboreal or subterrestrial. 



Under the second are included only apterous species of Goiia- 

 topiis and the four genera named above in connection with it, 

 and all these are parasitic on Jassids, whether arboreal or sub- 

 terrestrial. 



The third, comprises all the other genera, of all of which we 

 have bred species, and these are attached solely to Fulgorid leaf- 

 hoppers either arboreal, or subterrestrial (i. e. graminivorous"). 



It is interesting to note that the first division which consists 

 of the most primitive forms of Dryinidae are attached only to 

 the less specialized Jassidae, while the varied and highly evo- 

 luted forms included under the third are restricted to the highly 

 specialized Fulgoridae, the second section containing compara- 

 tively a few highly evoluted but always apterous forms that stili 

 remain attached to the Jassidae. Further it will be noted thai 

 the chelar claw of the first and second divisions comprising para- 

 sites of Jassids only, is always of different form and differently 

 armed from those of the third, which are parasites of Fulgorids. 

 and as far as our researches go, a Jassid parasite can immediately 

 be distinguished from that of a Fulgorid by an examination of 

 the claw alone, 



THE NATURAL POSITION OF THE DRYINIDAE. 



The Dryinidae are treated by Ashmcad in his later classifica- 

 tions as a sub-familv of the Bethylidae, the latter being included 

 in the super-family Vespoidea. In placing the insects in the 

 Aculeate series he reverts to Haliday's classification of 1839, 



