4 HEMIPTERA-HOMOPTERA. 
8. Icerya. purchasi. 
Icerya purchasi, Maskell, Trans. New Zeal. Inst. xi. p. 221 (1878). 
Hab. Mexico: Guaymas (Townsend); Hermosillo (Townsend); Magdalena (Towns- 
end); Monterey (Lownsend). 
This insect exists in two forms, which are probably distinct species. The form 
maskelli, Ckll., is found near Guaymas, and the form crawiz at Magdalena. See 
Townsend, Journ. N. Y. Ent. Soc., Sept. 1898, pp. 165-167. 
Subg. Proticerya, Ckll. 
4, Icerya littoralis. . 
Icerya littoralis, Ckll. Ann. & Mag. Nat. Hist., June 1898, p. 429. 
Hab. Mexico: El Faro near Frontera (Townsend); Tehuantepec city (Townsend). 
A var. mimose, Ckll., from Las Minas near Frontera (Townsend), has been described 
by me (loc. cit.). 
5. Icerya rileyi. 
Icerya rileyi, Ckll. Psyche, Dec. 1895, Suppl. p. 15. 
Hab. Mexico: Juarez in Chihuahua (Cockerel/). 
Originally described from New Mexico. 
CRYPTICERYA, Ckli. 
1. Orypticerya rose. 
Icerya rose, Riley & Howard, Insect Life, ii. p. 333, iii. p. 98. 
Hab. Mexico: Tehuantepec city (Townsend). 
mexicana, Ckll. & Parrott, subsp. n. 
9. About 7 millim. long., 5 broad, 44 high. Dark red, stained with black in the dorsal region, more or less 
covered with white powder ; three longitudinal series (one dorsal, the others lateral) of rather large patches 
of bright sulphur-yellow secretion, extending over the anterior half of the insect. Legs black. 
Newly-hatched larva similar to that of C. rose, but the lateral hairs before the six long caudal ones are not 
usually so long, and there are two very long hairs-on each side of the body in the cephalothoracic region, 
The following measurements (in ,) will assist identification :— 
Larva. Legs: coxa 70-74; femur with trochanter 231; tibia 239-281; tarsus 165; claw 38-41. 
Larva, Antenne: segments (1) 39-49, (2) 57-66, (3) 66-74, (4) 53-57, (5) 49, (6) 149-165. 
Larva. Median caudal hairs 994-1143 »; second caudal hairs 828-994 p3; anterior long cephalothoracic hairs 
496-579 ; posterior long cephalothoracic hairs 463-496 y. 
Adult female. Antennal segments (1) 132, (2) 99, (3) 107-115, (4) 82-99, (5) 78-82, (6) 54-66, (7) 54-66, 
(8) 82, (9) 82, (10)?, (11) 198. Legs: coxa 248-265, femur with trochanter 695-748, tibia 636-666, 
tarsus 331, claw 82. There are dermal hairs of two sizes—the larger 298 p, the shorter 66 fle 
Hab. Mexico: Aguas Calientes, May 1, 1898, on Prosopis, sp. (Townsend). 
This subspecies has the yellow spots of C. australis, Mask., but differs from that 
insect and from C. rose in the lateral hairs of the larva. 
