i6 



any long hair on the trochanter nor any terminal spine on the tibia. 

 The tarsal and claw digitules are all fine hairs. Anal ring compound 

 with six hairs. Anal tubercles inconspicuous, setiferous. Mentum 

 dimerous with some hairs at the end. Margin of body bearing a few 

 small conical spines wide apart (sometimes absent), which are in 

 pairs or threes on the abdominal segments; and similar spines are 

 very sparsely scattered on the dorsum where there are also some 

 scattered fine hairs. Epidermis bearing many circular spinnerets of 

 two sizes, those on the dorsal surface being twice as large as those on 

 the ventral. 



"Larva dark red, flattish, elliptical, active. Length about one- 

 ninetieth inch. Antennae thick with 6 joints, of which the last is the 

 largest. Feet also rather thick. Tarsus longer than the tibia and 

 digitules are all fine hairs. Anal tubercles normally with moderate 

 setae. Margin of body with only a few very small spines. 



"Male unknown." 



There is also commonly found on cotton the so-called " black 

 scale," Saissetia oleae (Bern.), a species that is widely distrib- 

 uted over the world, with a great variety of host-plants. Here 

 it is not entirely confined to cotton, having been taken as well 

 on sisal, Ceara rubber tree, guava and crotalaria. 



It is usually found on the stem or branches of cotton, but 

 never in great numbers, and it is hardly likely to be a serious 

 pest, as its multiplication is checked by both internal parasites 

 and ladybirds. 



Remedies: The use of artificial remedies for the control of 

 mealy-bug and scale insects is hardly warranted from a prac- 

 tical standpoint unless in an exceptional outbreak they should 

 threaten the life of the plants. Ordinarily their multiplica- 

 tion will be kept within reasonable bounds by their natural 

 enemies. In case of abnormal increase, the use of a strong 

 nozzle stream of water from a force-pump, to dislodge the egg- 

 sacs, eggs or old shells, followed by spraying with kerosene 

 emulsion (strength 1 to 20), is likely to bring beneficial results. 



The introduction of specific parasites for these destructive 

 species, if such exist, is highly desirable. 



BOLL-WORM. 



Without doubt the worst insect enemy of cotton in Hawaii 

 is the boll- worm, the larva of a Tineid moth, Gelechia gossypiella 

 Sdrs. In many parts of the islands its ravages are unknown, 



