INSECTS 



OAK GALL-FLIES 



Galls producing females only 

 (Agamic) 



Andricus fecundatrix, Hartig 



— globuli, Hartig 



— radicis, Fab. 



— Sieboldii, Hartig . 



— corticis, Lin. 



— coUaris, Hartig 



— autumnalis, Hartig 



— callidoma, Adler . 



— Malpighii, Adler . 

 Trigonaspis renum, Giraud 

 Biorhiza aptera. Fab. . 

 Dryophanta folii, Lin. 



— longiventris, Hartig 



— divisa, Hartig 

 Neuroterus lenticularis, Olivier 



— fumipennis, Hartig 



— laeviusculis, Schenck. 



— numismatis, Olivier 



— Schlechtendali, Mayr 



— punctatus, Bignell (females only were bred) 

 Andricus quadrilineatus, Hartig 



— marginalis, Schlech' 



— ostreus, Giraud 



— albopunctata, Schlech 



— seminationis, Giraud 



— glandulae, Schenck 



— solitarius, Fonscol 

 Cynips KoUari, Hartig 

 Dryophanta agama, Hartig 



— disticha, Hartig 

 The agamic form unknown 



The next generation is 



Galls producing males and females 

 (Sexual) 



Andricus pilosus, Adler 



— inflator, Hartig 



— trilineatus, Hartig 



— testaceipes, Hartig 



— gemmatus, Adler 



— curvator, Hartig 



— ramuli, Lin. 



— cirratus, Adler 



— nudus, Adler 

 Trigonaspis megaptera, Panzer 

 Biorhiza terminalis. Fab. 

 Dryophanta Taschenbergi, Schlec 



— similis, Adler 



— verrucosa, Schlec 

 Neuroterus baccarum, Lin. 



— tricolor, Hartig 



— albipes, Schenck 



— vesicatrix, Schlec. 



— aprilinus, Giraud 



Sexual forms unknown, if there are anjr 



Andricus amenti 



ROSE GALL FLIES AND OTHERS 



Rhodites eglanteriae, Htg. Gen. dist. 



— rosae, Linn. Gen. dist. 



— spinosissimae, Gir. Nr. the sea on Rosa spinosissima 

 Aulax hypochaeridis. Around Plymouth on Hypochoeris 



radicata 



Xestophanes potentillae, Linn. Egg Buckland on Po- 

 tentilla reptans (T. R. Archer Briggs) 



Diastrophus rubi, Htg. Nr. Plymouth on Rnbus 

 fruticosus 



ICHNEUMONIDAE 



PARASITIC HYMENOPTERA 



The Ichneumonidae are such a neglected order that some of their life histories it is trusted 

 may prove interesting to those who have not given them much time or thought, is the excuse for 

 making the introduction rather long, but possibly not tedious. 



The Ichneumonidae are readily distinguished from all other flies (if we except the wasps and 

 bees) by the distinct constriction of their abdomen at its juncture with the thorax their long 

 slender bodies, peculiar veined wings, all having a stigma and exserted ovipositor; but like everything 

 in nature there is no hard and fast line, for there are females whose wings are no longer than their 

 eyes, Aptes'ts nigrocincta, Gr. ; others entirely without wings, genus Pe-zomachus, Gr. ; while the 

 males in the majority of cases have ample wings reaching to the end of the abdomen. 



So it is with the ovipositor ; in the greater number of females of the genus Ichneumon and 

 others, the ovipositor is hidden, while that of the Rhyssa persuasoria, Linn., is an inch and a half in 

 length, longer than the fly (head, thorax, and abdomen). Others shorten in their respective 

 families until they are hidden when looking at them from above. The Ichneumonidae are parasites 

 on butterflies and moths (Lepidoptera), sawflies (Tenthredinidae), flies (Diptera) (two-winged flies) 

 and other orders. 



' The writer believes this to be a variety of quadrilineatus. 

 171 



