104 



vine which he had collected July 30, 1887, at San Jos^ de Guaymas, 

 9 miles north of Guaymas proper, Sonora, Mexico. Along the main 

 ribs, principally on the undersides of the leaves, were fixed many white 

 scale insects wliich examination showed to belong to a new species of 

 Icerya. The specimens consisted mainly of cast skins of the first and 

 second stages, and, although a few dry and shriveled specimens of the 

 lice in each of these stages were found, no adults or larger larvae of 

 either sex were present. 



This material would, under other circumstances, seem very insuffi- 

 cient to warrant the founding of a new species, yet the characters are 

 fairly good, it is evidently a new form, and the great economic impor- 

 tance of the genus justifies a description, however incomplete, in this 

 connection. 



Fig. 19. — Icerya palmeri . 



a, newly batched iarva : 

 of I) — still more e 



li, larva, secoud sta^e — greatly enlarged; c, antenna 

 ilarged (oriirinal). 



Icerya palmeri n. sp. 



Newly hatched larva — First Stage (Fig. 19, a). — Color, reddish yellow. The pro- 

 portions of the autenual joints are as in the other species, except that the club is 

 somewhat longer than joints 4 and 5 together and has a large swelling at base fol- 

 lowed by a constriction. The tarsi are long, nearly straight, and nearly as long as 

 their tibiae; the chitinous band at base of front coxte is narrow. The six anal bris- 

 tles are very long and stout — as long as entire body. The twelve abdominal bris- 

 tles (six each side above anal bristles) are only one-third as long as anal bristles; 

 their tubercles project at right angles to the body and the bristles curve gradually 

 backward. The head bristles are very prominent, particularly the two large ones 

 between the bases of the antennae, each of which reaches to the tip of the fifth anten- 

 nal joint. The secretory pores are numerous and much larger than in the corre- 



