. The Cambridge natural history. Zoology. SCOLIIDAE—-THYNNIDES SCOLIIDES 97 cases, however, have the sexes heen matched, so that at present males are no doubt standing in the lists of Hymenoptera as one species and their females as other species. Sub-Fam. 3. Scoliides.—Pronotum reacliing hack to the tegulae; legs stout; intermediate tibiae with one apical spur; both sexes winged; the nervures not extending to the p)osterior ( distal) margin. This group includes some of the largest and most powerful of the Aculeate Hymenoptera. Its members are usuall}' hairy Insects with thick legs, the col
. The Cambridge natural history. Zoology. SCOLIIDAE—-THYNNIDES SCOLIIDES 97 cases, however, have the sexes heen matched, so that at present males are no doubt standing in the lists of Hymenoptera as one species and their females as other species. Sub-Fam. 3. Scoliides.—Pronotum reacliing hack to the tegulae; legs stout; intermediate tibiae with one apical spur; both sexes winged; the nervures not extending to the p)osterior ( distal) margin. This group includes some of the largest and most powerful of the Aculeate Hymenoptera. Its members are usuall}' hairy Insects with thick legs, the colour being black, more or less variegated with bands or spots of red or yellow ; the hind body is elongate, has only a very short pedi- cel, and in the male is usually termin- ated by three project- ing spines. The pro- notum is of variable dimensions,but its front angles are always co- adapted with the points of insertion of the front wings. The nervuration of the front wings is confined to the basal part, the extensive apical or outer area possessing no nervures. There is frequently a great difference in the size of the two sexes of the same species, the female being very much larger than the other sex. The larvae, so far as is known, devour those of Lamellicorn Coleoptera. Fabre has investigated the habits of some of the species of Scoliides found in France, and has informed us that their means of subsistence consists of larvae of the larger Lamellicorn beetles, Cetonia, Oryctes, Anoxia, and Euchlora ; these beetles belong to very different divisions of the Lamellicornia, but they have in common the fact that their larvae are of subterranean habits, living in the earth or in accumulations of debris in which there is a large proportion of vegetable matter or roots. The female Scolia penetrates into the ground in order to find the Lamellicorn larvae necessary as food for its progeny. Scolia bifasciata VOL. YI H. Fig. 40.—Scolia haemorohoidalis 9- Please note that
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