ENTOMOLOGICAL NEWS 



PROCEEDINGS OF THE ENTOMOLOGICAL SECTION 



THE ACADEMY OF NATURAL SCIENCES, PHILADELPHIA. 



Vol.. XXIX. 



OCTOBER, 1918. 



No. 8. 



CONTENTS: 



Gillette— Some Grass- Root A p h i d s 

 (Hem., Horn.) 281 



Malloch — Pyrrhoteshaematoloma H.S., 

 and Leptocoris trivittatus Say in 

 Illinois ( Hemiptera, Coreidae) 2S4 



Alexander — New Species of Crane-flies 

 from California ( Dip. ) 2S5 



Dunn — The Lake Mosquito, Mansonia 

 titillans Walk., and its Host Plant, 

 Pistia stratiotes Linn., in the Canal 

 Zone, Panama (Dip. : Culicidae).. 2SS 



Dozier — An Annotated List of Gaines- 

 ville, Florida (Coleoptera) 295 



Death of Prof. S. W. Williston 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 foniiicaria, 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 winged migrants of, at least, two species of Forda 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 does not 

 have the original descriptions to separate them. 



281 



