Thyreocoris nitiduloides Wolff. The most common Thyreocorid of the 

 region and commonly found along the edges of woods and on prairie hill- 

 side pastures. Several nymphs also were taken, most of them in July. 

 Specimens are at hand from Lake Okoboji and Granite. 



Thyreocorid lateralis Fabr. But ten specimens of this species were taken 

 during the summer and at Lake Okoboji only. All the specimens were 

 taken in July. They are usually found on vegetation along the edges of 

 woods in more or less moist situations. 



Thyreocoris puJioarius Germ. Two specimens only of this smallest Iowa 

 Thyreocorid were taken in this region. 



Subfamily Cydninae 



Stilus ohli-quiLS L^'hler. This species, first recorded from Iowa by the 

 writer, (Ent. News, XXIII, 182, 1916) was found in considerable numbers 

 on the sandy beaches at Gull Point. Heretofore, no nymphs had been found 

 but in the locality just mentioned on July 4, nymphs far outnumbered liv- 

 ing adults. In all, sixty-three specimens were taken; fifty-seven of these 

 were nymphs, some still in the first instar others apparently ready to molt 

 for the last time. A number of dead adults and a single live one were 

 also taken. The specimens were collected from among the roots of the 

 following plants all of which grow in considerable abundance on this sandy 

 peninsula: Bea'rd Tongue {Pensttmon grandiflorus Xutt.), Sedge (Cyperus 

 schiceinit^ii Torr.), Wormwood {Arlemisia caudata Michx.) and Rush 

 Grass (SporoboJiid cryptandriis (Torr.) Gray). L^sually not more than 

 three or four nymphs were foimd under a single plant; however, in one 

 instance, twenty-seven nymphs of different sizes were found in the sand 

 among the roots of one small bunch of Rush Grass. Some of the nymphs 

 colle<!ted were found near the bases of the stalks of Rush Grass, not hidden 

 in the sand at all but under the dead fragments of leaves and stems lying 

 on the sand. A few specimens were found down between adjacent stalks 

 and buried to a depth of an inch or more in the sand. At Iowa City, the 

 first locality record for Iowa, this species has been taken only from among 

 the roots of Rush Grass and until September, 1916. no nymphs had been 

 taken. On September 23 a single half-gTOwn nymph was colletced at this 

 place. 



Avui-esius spinifrons Say. But two specimens of this species were se- 

 cured and these constitute the only ones taken in the state during the past 

 three siunmers. The present specimens were taken from blue grass on the 

 sandy knoUs immediately to the south and west of the Lakeside Laboratory. 



Amnestus pusiUus Uhler. One specimen of this small Cydnid was taken 

 in July at the same locality as the preceding. The only other Iowa speci- 

 mens at hand are from Iowa City. 



Sehirus oijictu-s P. B. At Lake Okoboji to the south west of Elm Crest 

 two specimens of this species were taken in a low cleared space grown up 

 in timothy and blue grass. Sis other specimens were taken at Forest 

 City from weeds growing along the margins of a large drainage ditch. 

 The species has usually been found in low places near water. 



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