8 OENEKA OF HYMENOPTKRA. 



parasitically upon other living insects ; this subsection is subdivided 

 into two divisions, the first of which, the Spiculifem, having the ab- 

 domen furnished with a plurivalve oviduct and containing the fami- 

 lies (Jtjnipiihv, Evaniidce, Ichneiimonidxe, BmconMie, Chalcididw and 

 •P)'odoirup'uhe. The second division, termed the Tubulifera, having 

 the extremity of the abdomen tubular and retvnctile, and furnished 

 with a minute sting, the larvae feeding uj)on the larvae of other hy- 

 menopvera, or upon dead or paralized insects deposited by the parents 

 of such larvae for the support of the latter, and containing the single 

 family ChrysididcE. 



The second Section — Aculeata — is divided into two subsections, 

 viz.: Praedones (including the Heterogyna, Fossores and Diplop- 

 teryga) having the basal joint of the posterior tarsi cylindrical, not 

 dilated, nor formed for collecting pollen, the larvae feeding upon 

 other insects stored up, or upon animal or vegetable fluids provided 

 by workers, and containing the families Crabromdce, Larrid(je, Bem- 

 becidw, Sphecidce, Seotiidce, MntHlkkc, Formicidie and VespidcB. The 

 second subsection, the Mellifera ( Anthophila Latr.), having the basal 

 joint of the posterior tarsi dilated and pollinigerous, the larvae feed- 

 iiig upon honey or pollen paste deposited by the parent, or collected 

 by workers, and containing the families Andrenidce and Apidoe. 



The arrangement followed in this Synopsis is similar to that pro- 

 posed by Dr. Hartig (in Wiegmann's Archiv. 1837, No. 2), and 

 agrees somewhat with the above, except that the two principal divi- 

 sions are founded upon the structure of the trochanters. 



The following table will serve to distinguish the diflerent series : 



Table of Series. 



Trochanters two-jointed. — Hym. ditrocha. 

 Abdomen connate with the thorax. 



Anterior tibise witli two apical spin's PHYLL0PHA6A. 



Anterior tibine with one apical spur XTL0PHA6A. 



Abclonien sessile or petiolate FABASITICA. 



Trochanters one-jointed. — Hym. monotrooha. 

 Ba.sal joint of posterior tarsi cylindrical. 

 Apical segments of abdomen tubular, retractile, telescope-likcTUBULIFERA. 

 Ai)ical segments of abdomei not so formed. 

 Petiole of abdomen with one or more scales or nodes; sexes three "J) 9 5 • 



HETEBOGYNA. 

 Petiole of alMhmien simple, without scales or nodes; sexes two, % and 9- 



Wings not folded longitudinally FOSSORES. 



Wings folded longitudinally in repose DIFLOPTERYGA. 



Basal joint of posterior tarsi almost always more or less dilated and densely 

 pubescent ANTHOPHILA. 



