Insect Enemies of Greenhouse and Ornamental Plants 19 



the plants, but usually in the curled up, basal part of the leaf or 

 in the sheath surrounding the flower stalk. Advantage is taken of 

 this habit by the orchid-grower who sometimes sends a man daily 

 through the house to hunt out and destroy them. Up to the present 

 I have been unsuccessful in my search for larva? and pupa? and 

 know nothing concerning the early stages. Mr. G. C. Champion 

 writes that the eight known species of diory melius are all from 

 Central America and that this new species is* related to D. octostri- 

 atus and D. 12-striatus. 



Mr. C. R. Crosby 21 records C. Icevimargo as feeding on orchid 

 roots in a greenhouse at Ithaca, N. Y. This species was also de- 

 scribed by Mr. Champion 22 , mostly from New Jersey specimens and 

 his description is given herewith. 



Rhomboidal, narrow, shining, black; glabrous above, the punctures 

 of the under surface and legs each bearing a minute whitish scale. 



Fig. 32. Diorvmellus Iceimargo Champ. 



Head finely punctate, transversely grooved between the eyes; rostrum 

 moderately long, stout, arcuate, finely punctate, striate at the sides, 

 smoother in the female. Prothorax, transverse, conical, constricted before 

 the apex, sparsely, finely punctuate, the punctures becoming coarser near 

 the basal and apical margins. Elytra narrowed from a little below 

 the base, the humeri not prominent; each with six sharply-cut, rather 

 broad, deep, sparsely punctured stria? on the disc, and another stria 

 along the margin beneath, the interstices flat, each with an irregular 

 row of excessively minute punctures. Beneath, coarsely, closely punc- 

 tate; ventral segmenti broadly hollowed and smoother in the middle of 

 the male. Prosternal sulcus deep v-shaped, strongly marked, not extend- 

 ing beyond the anterior coxae widely separated. Femora feebly sulcate 

 beneath. Length 17/8-2, breadth, i-ii/io mm. (male and female). 



21 Crosby, C. R., 1916. In Ent. Mo. Mag. ser 3, v. 2, p. 202 

 22Loc. cit. Footnote no. 19, p. 18. 



