72 IOWA ACADEMY OP SCIENCES. 



elytra washed with testaceous brown, the elytral nervures fuseous 

 brown. 



Genitalia; ultimate ventral segment of the female twice longer 

 than the penultimate, posteriorly truncate, with a slight median 

 tooth; ovipositor attenuate, as long as the rest of the abdomen, half 

 longer than in viridis; male, valve concealed; plates broad at base, 

 rapidly, roundingly narrowing to the middle, beyond which they 

 extend as finger-like plates; a fuscous crescent inside the margin 

 on either side at the base, spines on the pygofers fuscous. 



Described from numerous specimens collected at Fort Col- 

 lins and Wray, Colo., and Stratton Neb., from "salt grass," 

 Distichilis maritima, growing on alkali flats and in pastures. 

 The larvae appeared the middle of April, the adults about the 

 1st of June. 



EXPLANATION OF PLATE V. 



Figure 1 Dicyphonia ramentosa, Brachypterous female; 2 Elytra, Macropterous 

 female; 3 Elytra, male; 4 Pace, female; 5 Genitalia, male; 6 Memnonia consobrina, 

 Brachypterous female; 7 Elytra, Macropterous female; 8 Elytra, male; 9 Genitalia, 

 female; 10 Genitalia, male. 



A NOTABLE RIDE. 



FROM DRIFTLESS AREA TO lOWAN DRIFT. 



BY SAMUEL CALVIN. 



There is in eastern Iowa one short journey which shows a 

 more interesting variety of land forms in small space than can 

 be seen almost anywhere else. It shows too, in a typical way, 

 the different surface aspects of areas belonging respectively 

 to the driftless area and to the plains of Kansan and lowan 

 drift. For these reasons the journey referred to should 

 become famous, and might well become a standard in certain 

 particulars, among students of Pleistocene deposits and topo- 

 graphic forms. The journey is over the Illinois Central 

 railroad; it begins at Dubuque, and it may end at Dyersville. 

 The whole distance does not exceed thirty miles. 



At Dubuque the topography is that of the driftless area, and 

 the topographic forms are determined by the effects of erosion 

 on the massive, dolomitic cliff-forming Galena limestone. In 

 and around the city the Galena, has been sculptured by atmos- 

 pheric and other agencies into numerous picturesque towers 

 and castles and mural precipices ranging from fifty to two 

 hundred feet in height. There are bold salients standing 

 out prominently, like jutting headlands, between the lateral 



