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. Fanners’ Bull. No. 45, U. S. D. A. pp. 5-6, fig. 1. 
2. 1904, Banks, Nathan. A Treatise on Acarina or Mites. 
Proc. U. S. Nat. Mus. XXVIII, pp. 74-76. 
3. 1911, Hinds, W. E. and Turner, W. F. Life History of 
the Rice Weevil (Calandra oryza L.) In Alabama. Jour. Eeon. 
Ent., Vol. IV, pp. 230-236, pi. 1. 
4. 1912, Gee, W. P. The Corn Weevil, (Calandra oryza 
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, pentacyleic, or reduced to tetra¬ 
cyclic or tricyclic; trimerous, usually actinomorphic; andrecium 
in two cycles or either the inner or outer cycle wanting or vestigial. 
Ovulary trilocular; seeds with endosperm; fruit usually a capsuie. 
Synopsis of the Families and Genera. 
I. Herbs with erect aerial stems and parallel veined usually narrow leaves; 
flowers bisporangiate. 
1. Stamens 6. Amaryllidaceaf.. 
(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. 
b. Stamen filaments united. Sisyrinchium. 
II. Twining vines with netted-veined, petioled leaves, mostly cordate. 
Flowers diecious. Stamens 6. dioscoreaceae. Dioscorea. 
