. Bulletin. Natural history; Natural history. 102 ILLINOIS NATURAL HISTORY SURVEY BULLETIN Vol. 21, Art. 4 is made in the text to "Betten (1934)" this book is the one indicated.' Family RHYACOPHILIDAE Rhyacophila fenestra new species This handsome species, fig. 1, is re- lated to members of the Carolina group but differs from previously described forms in the digitate spurs on the lateral arms ot the oedagus as well as in other points of the genitalia. Male.—Length 11 mm. Head straw color with a quadrangular dark brown spot between the ocelli; antennae and palpi dark brown; eyes blac
. Bulletin. Natural history; Natural history. 102 ILLINOIS NATURAL HISTORY SURVEY BULLETIN Vol. 21, Art. 4 is made in the text to "Betten (1934)" this book is the one indicated.' Family RHYACOPHILIDAE Rhyacophila fenestra new species This handsome species, fig. 1, is re- lated to members of the Carolina group but differs from previously described forms in the digitate spurs on the lateral arms ot the oedagus as well as in other points of the genitalia. Male.—Length 11 mm. Head straw color with a quadrangular dark brown spot between the ocelli; antennae and palpi dark brown; eyes black. Thorax brown with the venter, prothorax and lateral sutures yellowish. Abdomen straw color, the dorsum with a purplish cast. Legs straw color with the tarsi suffused with brown. Front wings gray with white markings in the membrane, each marking supplemented with a Oedagus. 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 Illinois. Natural History Survey Division. Urbana, State of Illinois, Dept. of Registration and Education, Natural History Survey Division
Size: 881px × 2838px
Photo credit: © Library Book Collection / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., booka, bookcentury1900, bookdecade1910, booksubjectnaturalhistory
