391 



In 1883 I discovered the same species in the conservatory of this 

 Department to be extremely abnndant, both on the npper and under 

 sides of the leaves of a species of Amarillis. Some of the leaves were 

 so badly infested that their entire surface became blistered and bright 

 red, as if attacked by a peculiar fungus. 



I have observed it also on quite a number of different kinds ot hot- 

 house plants, as Ricliardia (vthiopica, Ficus grand ijiora and ehistica, 

 Aralia, Gardenia, Phtenix, and different species of Dractena; also ou 

 Hydrangea, Chrysanthemum, foreign grape-vines, cotton, and a num- 

 ber of weeds growing with some of the cultivated i)lants. 



It ai^pears from these observations that this species may gradually 

 become as troublesome m hothouses as the other two species. 



Heliothrips cestri sp. nov. 



Length, 1.2""". General color black or dark brown; the end of the body more or 

 less distinctly reddish. Head reddish, marked with a rather broad, dusky, median 

 stripe and a shorter one behind each eye. Eyes dark brown. Ocelli reddish. 

 AntenniB dark yellow, with apex of first, fourth and fifth and the remaining joints 

 black. Prothoras generally a shade darker than the head, and marked with a still 

 darker median and lateral stripe. Legs reddish-yellow ; median and jiosterior femora 

 and tip of tarsi blackish. "Wings dusky, marked with a pale band near base, a rather 

 indistinct band beyond the middle and frequently a pale apex, while the surface is 

 clothed with minute whitish hairs, and the veins with stiff S2)iues. Fringes dusky. 

 Surface of body reticulated, coarsest ou the abdomen. Third antennal joint almost 

 as long as the two following joints combined; the fourth and fifth subeqnal in 

 length, each of them scarcely longer than the second. 



The larvcB are whitish, sometimes slightly greenish or yellowish, and 

 the alimentary canal,, when filled, more or less distinctly brownish; they 

 are very dirt}^ looking on account of a clear or brownish fluid, which 

 they eject from the upturned anal segment. The eyes are small and 

 brown. 



HELIOTHRIPS FASCIATA SP. NOV. 



A specimen of this handsome little species was sent to the Depart- 

 ment of Agriculture by Mr. G. AV. Harney, of Yuba County, Cal.,with 

 the statement that two of them were discovered by him in Xovember, 

 1894, on a leaf of orange infested with Aspidiotus aurantii. This acci- 

 dental occurrence of these specimens ou the infested leaf makes it 

 appear as though they might be preying upon the scales, which, how- 

 ever, I seriously doubt, since none of the other known species of this 

 genus have shown carnivorous habits. 



Heliothrips fasciata sp. nov. 



Length, about 1""". General color, black. Head and thorax dark brown ; the ante- 

 rior margin of the prothoras and more or less of the mesothorax yellowish-brown. 

 Eyes black. Ocelli clear, yellowish. Antenu;e whitish; a broad band on joints 

 3 and 4, apex of the fifth and the remaining joints black. Legs black, with apes 

 of femora, base and apex of tibias and the tarsi, except the apex, yellow. Anterior 

 wings blackish; their base and a broad band beyond the middle transparent white. 

 Posterior wings faiutly and uniformly yellowish. Fringes blackish. Head and 

 thorax reticulated and furnished rather sparsely with .short, slightly curved hairs. 



