268 



The arrangemeut of the triplet cyclone received from Messrs. Kutz 

 ner Bros, is shown in the following illustration (Fig. 03). The nipple, 



which is designed to enter five sixteenths 

 inch hose, is surmounted by a hemispherical 

 chamber, h, which is covered with a milled- 

 edge cap, a, which screws into the chamber, 

 h. On thiscap are mounted at the angles of 

 of a triaugle three Riley nozzles. The one to 

 the rear stands higher than the others and 

 delivers its spray straight in front, while the 

 lower ones are respectively freed slightly to 

 the right and left of a direct line. This ar- 

 rangement secures a broad diverging cloud 

 of spray and very much facilitates the work 

 without in any way detracting from the qual- 

 ity of the spray as is the case when an attempt is made to increase the 

 capacity by enlarging a single nozzle. A disgorger could be easily added 

 to the chambers as here arranged, but as yet we believe no attempt has 

 been made to do so. A screen of fiue wire cloth is placed across the 

 hemispherical chamber, thus rendering clogging almost impossible. 



Fig. 63.— The New Zealand Tiiiikt— 

 leducL'd (Original). 



THREE NEW PARASITES OF ICERYA. 



By L. O. Howard. ^ 



Professor Eiley has turned over to me for description three of the 

 parasites reared by Mr. Coquillett,at Los Angeles, from the Fluted Scale 

 {Icerya purchasi). These he has referred to by name in his annual re- 

 port for 1888, and the accompanying figures are from the report. The 

 necessity for condensation, however, rendered it desirable that this de- 

 scriptive matter should be published elsewhere. Keither of the three 

 species seems to be at all abundant. 



THORON OPACUS, sp. iiov. 



Male. — L.eugth, 0.84™'" ; expanse, 1.2'""' ; greatest width of fore wing, 0.163""" ; length 

 of antenna, 0.6 '"'". Joint 1 of funicle rather shorter and slightly narrower than pedi- 

 cel ; funicle joints distinctly separated, subequal in length, increasing very slightly 

 in width from 4 to 9, joints 2 and 3 eqnal in width and slightly slenderer than either 

 1 or 4 ; chib one-third longer than joint of funicle, ovate, at base of same width as 

 joint 9 of funicle, without a trace of dividing sutures. Metanotal spiracles large, oval ; 

 nietascutelluni with astraight median longitudinal furrow. Abdomeu flattened, ovate, 

 rather longer than thorax. General surface of the body with no visible puuctation, 

 opaque. Head, antennie and thorax dark brown; abdomen rather lighter ; all legs 

 brown; tarsi nearly white; base of all tibi;e nearly white. AVings hyaline; veins 

 slightly dusky. 



Descril)ed from 1 ^ specimen, rather poorly mounted in balsam, reared by D. W. 



