



; 

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ENTOMOLOGICAL NRWS 



AND 



PROCEEDINGS OF THE ENTOMOLOGICAL SECTION 



THE ACADEMY OF NATURAL SCIENCES, PHILADELPHIA. 



VOL. XXIX. 



OCTOBER, 1918. 



No. 8. 



CONTENTS: 



Gillette Some Grass-Root Aphids 

 (Hem., Horn.) 281 



Mai loch Pyrrhoteshaematoloma H.S., 

 and Leptocoris trivittatus Say in 

 Illinois ( Hemiptera, Coreidae) 284 



Alexander New Species of Crane-flies 

 from California (Dip.) 285 



Dunn The Lake Mosquito, Mansonia 

 titillans Walk., and its Host Plant, 

 Pistia stratiotes Linn., in the Canal 

 Zone, Panama (Dip.: Culicidae).. 288 



Dozier An Annotated List of Gaines- 

 ville, Florida (Coleoptera) 295 



Death of Prof. S. W. Wjllislon 298 



Jones Dohrniphora venusta Coquillett 



( Dipt.) in Sarracenia flava 299 



The Rev. O. Pickard-Cambridge and 



his Collection of Arachnida 302 



Van Dyke New Inter-Tidal Rock- 

 Dwelling Coleoptera from Calif 303 



Weiss Additions to Insects of New- 

 Jersey, No. 6 309 



Editorial No Simple Life for Insects 313 



Emergency Entomological Service 313 



Entomological Literature 314 



Doings of Societies Feldman Collect- 

 ing Social (Col., Dipt.) 319 



Obituary William Hague Harrington 320 



Some Grass-Root Aphids (Hem., Horn.). 



By C. P. GILLETTE, Fort Collins, Colorado. 



(Plate XVI.) 



FORDA Species. 



When Heyden, in 1837, characterized this genus from the 

 apterous form of his formic aria, he had not seen the winged 

 lice. Other species have been described since, but still no one 

 seems to have discovered that this root-feeding group of 

 aphids develop winged lice in mid-summer that desert the 

 grass roots to seek fresh food-plants. We have been rearing 

 the winded migrants of, at least, two species of Fordo, at the 

 Colorado Experiment Station for several years past. Believ- 

 ing their characterization will be of service in classifying the 

 group, I am giving descriptions of these alate forms with our 

 data upon life habits, and am also including enough of a de- 

 scription of the apterous forms to enable one who dpes not 

 have the original descriptions to separate them. 



281 



