The chief points in the life-history of Stylops and Xenos, which are parasitic on certain bees (Andrena) and wasps (Polistes), have been investigated by K.
Ants form a distinct and natural family (Formicidae) of the great order Hymenoptera, to which bees, wasps and sawflies also belong.
Such " workers " are essential to the formation of a social community of Hymenoptera, and their wingless condition among the ants shows that their specialization has been carried further in this family than among the wasps and bees.
Further, while among wasps and bees we find some solitary and some social genera, the ants as a family are social, though some FIG.
Another group of Hymenoptera occasionally causes much harm in fir plantations, namely, the Siricidae or wood-wasps, whose larvae burrow into the trunks of the trees and thus kill them.
Paired erectile plates (patagia) are borne on the prothorax in moths, while in moths, sawflies, wasps, bees and other insects there are small plates (tegulae) - see Fig.
The poison-glands of the sting in wasps and bees are well-known examples of these.
The offspring of the virgin females are in most of these instances females; but among the bees and wasps parthenogenesis occurs normally and always results in the development of males, the " queen " insect laying either a fertilized or unfertilized egg at will.
His classification was founded mainly on the nature of the wings, and five of his orders - the Hymenoptera (bees, ants, wasps, &c.), Coleoptera (beetles), Diptera (two-winged flies), Lepidoptera (moths and butterflies), and Hemiptera (bugs, cicads, &c.) - are recognized to-day with nearly the same limits as he laid down.
Comprises gall-flies, ichneumon-flies, ants, wasps, bees.
Hence it is probable that no factor has had a greater influence than these wasps in moulding the protective instincts and habits of spiders.
Now the Pompilidae or mason wasps provision their cells with insects of many different kinds, as well as with spiders; but, of the hundreds of species of these wasps that have been described from different parts of the world, only one is known to use ants for this purpose; and this species is not one that preys upon spiders.
It is noteworthy, however, that although the manner in which the prey is stung (for example) is on the whole similar in the case of the members of any given species - that is to say, all the wasps of the species behave in very much the same manner - yet there are minor variations in detail.
Furthermore, the observations on American wasps render it probable that the earlier accounts of the instinctive behaviour of such wasps are exaggerated.
These are very simple, open and generally regular flowers, white, greenish-yellow or yellow in colour and are chiefly visited by insects with a short proboscis, such as short-tongued wasps and flies, also beetles and more rarely bees.
Hornets, bees and wasps of many varieties abound.
The wasps came by thousands to my lodge in October, as to winter quarters, and settled on my windows within and on the walls overhead, sometimes deterring visitors from entering.
Like the wasps, before I finally went into winter quarters in November, I used to resort to the northeast side of Walden, which the sun, reflected from the pitch pine woods and the stony shore, made the fireside of the pond; it is so much pleasanter and wholesomer to be warmed by the sun while you can be, than by an artificial fire.
Drones, bumblebees, wasps, and butterflies knock awkwardly against the walls of the hive in their flight.