Bulletin - State Geological and Natural History Survey of Connecticut . and manage them for the purpose of controlling injuriousinsects. The greatest care must be exercised in classifying the insectsof this group, because the multiplicity of species and their closerelationship make their recognition a difficult subject group is so homogeneous that in order to classify its com-ponents a knowledge of the general appearance and character ofthe insects as a whole, or habitus, is quite essential. Habitus al-though sufficiently tangible to the experienced eye can not be sat-isfactorily d
Bulletin - State Geological and Natural History Survey of Connecticut . and manage them for the purpose of controlling injuriousinsects. The greatest care must be exercised in classifying the insectsof this group, because the multiplicity of species and their closerelationship make their recognition a difficult subject group is so homogeneous that in order to classify its com-ponents a knowledge of the general appearance and character ofthe insects as a whole, or habitus, is quite essential. Habitus al-though sufficiently tangible to the experienced eye can not be sat-isfactorily described, so the beginner must have access to anauthoritatively determined collection, or, such not being avail-able, recourse must be taken to a study of the figures of vonVollenhoven in his two works, the Schetzen and Pinacographia. Inasmuch as the Icheumonoid fauna of this state is imper-fectly known, the keys in the following pages cannot be regardedas final, although in many cases they will lead the student to asatisfactory conclusion. HYMENOPTERA OF CONNECTICUT. 12 178 CONNECTICUT GEOL. AND NAT. HIST. SURVEY. [Bull. NOMENCLATURE OF WING PARTS IN THE DRAWING OFAMBLYTELES CENTRATOR. OLD SYSTEM Veins Costa + subcostal (In the Ichneumonoidea considered in this work these veins are usually seemingly but not actually coales- cent.) First transverse cubital . Second . Cubital First recurrent Second ... Basal . , . . Subdiscoidal ....Abbreviated cubital, or stump .Externomedial 1st abscissa . 2d and 3d abscissa Transverse median of fore wings, or nervulus .... T.^ . - ,. fist abscissa Margmal or radius J,,, i ^ j i ]2d and 3d abscissa Transverse median of hind wings, or nervellus .... Discoidal COMSTOCK-NEEDHAM SYSTEM VeinsCosta (C)+ScH-R + M r-m and RgR* ]Mi + 2 and Ri + 5 + Mi Ma+ 4 Transverse part of M2 or first abscissa of M2 M and m-cu m and M2 M Cu M4 Ma Cuiradial cross-veinRs Ms Cells AreoletCubitodiscoidal R4 + 5 1st Ri Cells R + M4 Key to Families* 1. Mesothorax wi
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