&4 



The general conditions of this prairie appear to hsMC been less dis- 

 turbed than at Station I ; at least the prairie TC^etation is more exten- 

 sive and unif orm. The change in the T^etation is apparently greater 

 than the change in the kinds of animals. Their feeding and breeding 

 relations appear to be much like those at the prairie stations prerionsly 

 discussed. 



In the flowers of the cup-lea.Ted rosin-weed (SUphiwm integri- 

 folium) was found a giant bee-flj (Hxoprosopa fasciata) which had 

 been captured hy the ambush sfnder (Misuvaena aleatoria), and on 

 webs in colonies of this same plant the garden s[nder (Argiope awran- 

 tia) was obsenred, with a grasshopper (Mdmwplus differentioHs) en- 

 tangled in the web. From the flowers of this SUpMwm the following 

 insects were taken : Hpicf^ta marginata and E. penns^mimca, Rhyn,- 

 chites teneus, Phymata fasciata, Bncoptolopkus sordidus, Melanoplus 

 differentioHs (njmph), Xiphidium strictmn (adult and nymph), X. 

 attenuatum, MeUssodes Hmacidata and ohliqua, Epeolus concolar, and 

 Halictus fasdatus. The margined bUster-beede (Bpicauta marginata) 

 was found both upon the flowers and the leaves of the plant On the 

 flowers of the purple prairie doTer {Pettdostemum purpureum'). Bom 

 bus peansylvatdcus, XipMdium strictum, and EmscMstms vaviolarius 

 were taken. CbUection 176 was taken from the flowers of Uatris 

 scariosa, and Mos. 55 and 178 from the flowers of Mryngium. yucd- 

 folium. 



Swarms of the small com syrphid, Mesogramma poUtmm, were 

 present, on one day settling by dozens on my hands and clothes, where 

 they were easily grasped by the wing. It had been a warm day, and 

 this swarming was in the sunshine at about 4 130 p. m. The flies came 

 from a large com field a few feet away. 



