14 
INSECTS. 
Order Hymenoptera. 
9 
—. 
3. 
4. 
5. 
6. 
7. 
Suborder Sessihye xtres. 
1. Family Tenthredinidje —Saw-Flies. 
2. „ Siricid.e —Wood-Borers. 
Suborder Petiolata. 
Section Parasitica. 
1. Family Cynipiile—G all-Wasps. 
„ Proctotrypid.e —Egg-Wasps. 
Chalcidid^e —Parasitic Gall-Wasps. 
„ IcHNEUMONiDiE—Large Larvae-Wasps. 
Bracoxid.e—S mall Larvae-Wasps. 
Eyaniid.e—H ymenoptera Parasites. 
„ ChrysidiDtE —Burnished Wasps. 
Section Aculeata. 
1. Family Formicid.e —Social Ants. 
2. „ Mutillid^e —Parasitic Ants. 
3. „ Thynnid^e— 
4. „ ScOLIIDiE— 
5. „ Sapygid^e— „ „ 
6. „ Bembicid.e— „ „ 
7. „ Pompilid.e —Spider-Wasps. 
8. „ Sphegid^e —Locust-Wasps. 
9. „ Larriiae. 
10. „ Nyssonid^:. 
11. „ Crabronims —Fly and Aphid-Wasps. 
12. „ PHiLANTHiDiE— Andrena Parasites. 
13. „ JMasarida: —Solitary Wasps. 
14. „ Eumexiiue—M ud-Wasps. 
15. „ Vespid^; —Paper-Wasps. 
16. „ Andrenid^: —Solitary Bees. 
17. „ ApiDiE—Honey and Humble-Bees. 
The Saw-Fly Group,— Suborder Sessiliventres. 
♦ 
This group contains the various species of saw-flies, and may be subdivided 
into the saw-flies proper ( TentJtredinidce ) and the wood-borers, or tailed-wasps 
(Siricidcv), although it also comprises the little pith-boring Cepliiclai and the rare 
and little known species of Oryssidce. The food of the larvae of these insects 
consists entirely of vegetable matter. In the case of the first-named family, the 
leaves of trees and shrubs; in that of the second, the solid wood of various trees; 
and in the case of the third, the tender pith of the stalks of rye and also the 
shoots of pear and other trees. Such grubs as are internal feeders are either 
limbless, or have at most six more or less rudimental thoracic legs. Those, on the 
other hand, which live a free life and feed on foliage, are very similar in general 
appearance to lepidopterous larvae, from which they may be distinguished by the 
