CHAPTEE I 



HYMENOPTERA PETIOLATA CONTINUED 



SERIES 2. TUBULIFERA OR CHRYSIDIDAE SERIES 3. ACULEATA 



GENERAL CLASSIFICATION DIVISION I. ANTHOPHILA OR BEES 



The First Series — Parasitica — of the Sub-Order Hymenoptera 

 l*etiolata was discussed in the previous volume. We now pass 

 to the Second Series. 



Series 2. Hymenoptera Tubulifera. 



Trochanters undivided ; the hind-hody consisting of from three 

 to five visible segments ; the female ivith an ovipositor, 

 usually retracted, transversely segmented, enveloping a fine, 

 pointed style. The larvae usually live in the cells of other 

 H)ime7ioi)tera. 



The Tubulifera form but a small group in comparison with 

 Parasitica and Aculeata, the other two Series of the Sub-Order. 

 Though of parasitic habits, they do not appear to be closely allied 

 to any of the families of Hymenoptera Parasitica, though M. du 

 Buysson suggests that they have some affinity with Proctotrypidae ; 

 their morphology and classification have been, however, but little 

 discussed, and have not been the subject of any profound investi- 

 gation. At present it is only necessary to recognise one family, 

 viz. Chrysididae or Euby-wasps.^ These Insects are usually of 

 glowing, metallic colours, with a very hard, coarsely-sculptured 

 integument. Their antennae are abruptly elbowed, the joints 

 not being numerous, usually about thirteen, and frequently so 



^ Systematic monograph, Mocsaiy, Budapest, 1889. Account of the European 

 Chrysididae, R. da Buyssou in Andre, Si^cc. gen. Hym. vol. vi. 1896. 



VOL. VI IE B 



