May, 1914,] The Iridales of Ohio. 327 



destroyed the eggs and larvae as well as the adult weevils. The 

 method by which the mites gained access to the eggs was by bur- 

 rowing between the plug and the surrounding corn, which, appar- 

 ently, was not a difficult task. 



BIBLIOGRAPHY. 



1. 1897, Chittenden, F. H. Some Insects Injurious to Stored 

 Grain. Famiers' Bull. No. 45, U. S. D. A. pp. 5-6, fig. 1. 



2. 190-1, Banks, Nathan. A Treatise on Acarina or Mites. 

 Proc. U. S. Nat. Mus. XXVIII, pp. 74-7(3. 



3. 1911, Hinds, W. E. and Turner, W. F. Life History of 

 the Rice Weevil (Calandra oryza L.) In Alabama. Jour. Econ. 

 Ent., Vol. IV, pp. 230-23G, pi." 1. 



4. 1912, Gee, W. P. The Com Weevil, (Calandra orvza 

 Linn.), Bull. 170 S. C. Agr. Exp. Sta., pp. 1-13. 



THE IRIDALES OF OHIO. 



Lawrence W. Durrell. 



Trees, herbs, and vines with sword-shaped or sometimes broad, 

 netted veined leaves. Flowers bisporangiate or monosporangiate ; 

 usually showy though sometimes small and inconspicuous, with 

 perianth often united; epigynous, pentacylcic, or reduced to tetra- 

 C3^clic or tricyclic; trimerous, usually actinomorphic ; andrecium 

 in two cycles or either the inner or outer cycle wanting or vestigial. 

 Ovulary trilocular; seeds with endosperai; fruit usually a capsule. 



Synopsis of the Families and Genera. 



I. Herbs with erect aerial stems and parallel veined usually narrow leaves; 

 flowers bisporangiate. 



1. Stamens 6. Amaryllidaceae. 



(1.) Fruit a 3-valved loculicidal capsule; plant glabrous. 



a. Flowers in long spikes or racemes; perianth without a 



crown. Manfreda {Agave.) 



b. Flowers solitary or in umbels with a crown. Narcissus. 

 (2.) Fruit indehiscent; plants villous. Hypoxsis. 



2. Stamens 3, alternate with the inner corolla segments. Iridaceae. 

 (1). Style branches very broad and petal-like, opposite the sta- 

 mens. Iris. 



(2.) Style branches not petal like, slender or filiform, alternate 

 with the stamens. 

 a. Stamen filaments not united. 



(a). Flowers not tubular, in terminal bracted clusters. 



Gemmingia. 

 (b). Flowers single, perianth united in a long tube. 



Crocus, 

 h. Stamen filaments united. Sisyrinchium. 

 II. Twining vines with netted-veined, petioled leaves, mostly cordate. 

 Flowers diecious. Stamens 6. dioscore.^ceae. Dioscorea. 



