. Bulletin. Insects; Insect pests; Entomology; Insects; Insect pests; Entomology. PARASITE, APHIDIUS TESTACEIPES. 105 ents, both parent and offspring being preserved, Mr. H. L. Viereck, of this bureau, has been able to determine definitely for us the iden- tity of this species and to clear up the obscurity heretofore surround- ing it. He finds that it has been masquerading under 14 different names, and it seems that it may now be allowed to assume its right- ful designation. Mr. Viereck, after a careful study of all material at hand, has sup- plied us with the above list of synonyms. His work
. Bulletin. Insects; Insect pests; Entomology; Insects; Insect pests; Entomology. PARASITE, APHIDIUS TESTACEIPES. 105 ents, both parent and offspring being preserved, Mr. H. L. Viereck, of this bureau, has been able to determine definitely for us the iden- tity of this species and to clear up the obscurity heretofore surround- ing it. He finds that it has been masquerading under 14 different names, and it seems that it may now be allowed to assume its right- ful designation. Mr. Viereck, after a careful study of all material at hand, has sup- plied us with the above list of synonyms. His work on the revision of the genera Aphidius, Lysiphlebus, and Diasretus will appear later in some other publication. LIFE HISTORY. OVIPOSITION. Under favorable conditions the females begin ovipositing within a few hours after issuing, whether a male is present or not. When the female is placed in the presence of Toxoptera she will rush about. Fig. 20.—Aphidius testaceipes ovipositing in the body of the spring grain-aphis. Enlarged. (From Webster.) in an excited manner and when her antennae come in contact with an aphis she stops very quickly and thrusts her abdomen beneath her thorax and head (see fig. 20), giving the aphis a quick stab—some- times several if the first attempts were unsuccessful; she oftentimes lifts the smaller plant-lice completely from the leaf, they are stabbed so fiercely. The act of oviposition shown in the illustration is not intended to convey the impression that the Aphidius always attacks the grain aphis at this point, as it will stab it from any position; it will oftentimes reach around the margin of a leaf and pierce an aphis on the opposite side. After being stung the aphidids kick up the pos- terior part of the abdomen as though in pain, and sometimes a tiny drop of fluid will appear at the tip of the cornicles. At no stage do the aphidids appear to be exempt from attack. The Aphidius readily attacks the winged, but apparently prefers the wingless
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