. Monographs of the Diptera of North America [microform]. Diptera; Insects; Diptères; Insectes. I'siLoins. 2'20 palo-yi'llow ; tavsi tDwai'ds tlie tip only vory little dnrkor. but their small last joint more of less distinetly infuseated, esi)eeially that of the fore tarsi. Cilia of the te-rnhe whitish, llalteres white-yel- lowish ; their kiiol) infuseated on its lower half. Win<i's hyaline, only a little tinu'ed with n-rayish ; the last seti'nieiit of the fourth longitudinal vein is only very ucntly inlleeted forward from its middle, is in <j:eneral somewhat, distant frum the third lon
. Monographs of the Diptera of North America [microform]. Diptera; Insects; Diptères; Insectes. I'siLoins. 2'20 palo-yi'llow ; tavsi tDwai'ds tlie tip only vory little dnrkor. but their small last joint more of less distinetly infuseated, esi)eeially that of the fore tarsi. Cilia of the te-rnhe whitish, llalteres white-yel- lowish ; their kiiol) infuseated on its lower half. Win<i's hyaline, only a little tinu'ed with n-rayish ; the last seti'nieiit of the fourth longitudinal vein is only very ucntly inlleeted forward from its middle, is in <j:eneral somewhat, distant frum the third longitudinal vein, and approaehes it, esjieeially at its end, closely than is the ease in the ]»reeediiig hpeeies. IlaO. Middle iStiites. Gen. XLin. PSILOPl'S. The crenns ;ilopt(!roved by those exotic si)ecies, where this ap[)eudage is entirely wanting. The species of J'Kilojiiifi exhibit in the structure of the head and of its i)arts, es|)ecially in the anteniue, as also in the structure of the feet, of the wings, and of the male organs of co})ulation, numerous plastic diU'ereiiccs, which may easily mislead to the for- mation <'f snndler genera. The greater ])arl of these characters are merely ornaments of the males and exclusively specific distinctions, so as to l)e of little use I'iir the delinition of smaller genera ; this apjilies even to the most striking among the other characters, as, fi)r ii'staucc, to the e.'ilii'r dorsal or apical position of the arista, the either very s!'i)rt or very long iiulteseence of the second Joint of the antenmu ^v. ; lliese also all'urd no sharp limits, and there. 'i^M .1; ⢠\|v^ i'': â â â â ,â (.' â (. t , â : I' ,1! > i!:s. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Loew, H. (Hermann), 1807-1879; Osten-Sacken, C. R. (Carl Robert),
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Keywords: ., bookcentury1800, bookdecade1860, booksubjectinsects, bookyear1864
