. Monographs of the Diptera of North America [microform]. Diptera; Insects; Diptères; Insectes. ORTALID^âMYRMECOMYIA. 99 hand for comparison, and was obliged to write from memory. Tbe bristles on the first abdominal sef^nient, the distance inter- vening between the anterior ocellus and the posterior ones, and even the shape of the ovipositor remind very much of some genera in the group of lUchardina, from which, however, il//.s- chogaster is easily distinguished by the distinct bristles on the first longitudinal vein and the unarmed femora. The typical species of the genus is the Cephalia fem
. Monographs of the Diptera of North America [microform]. Diptera; Insects; Diptères; Insectes. ORTALID^âMYRMECOMYIA. 99 hand for comparison, and was obliged to write from memory. Tbe bristles on the first abdominal sef^nient, the distance inter- vening between the anterior ocellus and the posterior ones, and even the shape of the ovipositor remind very much of some genera in the group of lUchardina, from which, however, il//.s- chogaster is easily distinguished by the distinct bristles on the first longitudinal vein and the unarmed femora. The typical species of the genus is the Cephalia femnralis Wied. No species from North America are as yet known. Gen. VI. IUVRIWECOMYIA R. Dbsv. Characl.âBo()y slender, not unlike tiiat of an ant. Head comparatively large; occiput conspicuously stout behind the vertex. Front of a uniform, considerable breadth, very long and steep, so that the antennae are below the middle of the head ; the very large lateral stripes of the front have wrinkle-shaped cross impressions. Antenvm reaching a little below the anterior edge of the mouth; arista with a rather short pube'^cence. FroHt convex, not excavated in profile, but descending in an in- clined plane ; clypeus of a moderate transverse diameter ; cheeki rather broad. Thorax somewhat narrowed anteriorly; scutdlum small, with two bristles. Abdomen very much attenuated at the basis ; the narrow first seg- ment without bristles; about its middle it is '\o coarctate that its anterior portion assumes the shape of a knot. Feet very slender. Tegnla wanting; wincjs narrow, running into a point towards the basis, so that the posterior angle of the wing and the alula are wanting; auxiliary and first longitudinal veins closely approxi- mated ; the t^o posterior basal cells small; the posterior angle of the anal cell rather sharp. The very peculiar structure of the head, the approximated ocelli, the absence of bristles on the first abdominal segment and its peculiar coarctation, sufficiently d
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Keywords: ., bookcentury1800, bookdecade1870, booksubjectd, booksubjectinsects
