new Coccidse/rom Mexico. 439 



concentric strigation, the margin often quite white ; exuvias 

 large, first skin at margin of second, second skin more or less 

 covered by blackish secretion, or more often exposed ; the two 

 skins of the same colour, a very deep orange. 



? . — Colourless and transparent after boiling, except the 

 whole caudal portion, which is striate and chitinized, and 

 remains yellowish brown. No groups of circumgenital glands, 

 but numbers of small dorsal glands ; the four median lobes 

 resembling human incisor teeth, i. e. broad and squared at 

 the end, but separated by distinct intervals, and the second 

 lobes hardly over half the length of the first, though not much 

 less broad j third lobe represented by a pair of angular 

 prominences, separated by a wide interval from the second ; 

 beyond this the margin shows large irregular crenations. 

 Spines quite large ; spine-like plates beyond second and third 

 lobes quite large and broad, as in Diaspis. The females 

 contain extremely large embryos, which remain sepia-brown 

 after boiling, as in A. larrece] they show intensely dark eyes 

 and 6-segmented antennse, in which 3 and 6 are much 

 longest, 3 longer than 4 + 5, 2 shortest of all. 



($ . — Scale in texture like the female, but elongate, with 

 the larval skin at one end. 



Hah. Cuautla, Mexico, May 31, 1897, on a spiny wild 

 shrub {KoeheJe, 1751). Div. Ent. 7947. Also found by 

 Koebele at Cuautla on Mimosa^ and on an Acacia (?) with 

 yellow flowers and long spines {Koehele, 1696). 



This is the second known species of Pseudodiaspis. 



Aspidiotus {Chrysomphalus) longisstmus , sp. n. 



? . — Scale linear, 2^ millim. long, | raillim. broad, black, 

 more or less marked with brown, or even becoming whitish 

 or actually dull white from a coating of secretion. A thin 

 white ventral scale. Exuvise at one end, nearly circular; 

 second skin black, with more or less of a reddish-orange edge ; 

 first skin represented by a small low nipple-like structure, in 

 fresh specimens showing a distinct pale dot and ring. 



? .■ — Characters practically as in A. Bowreyi. Three 

 pairs of lobes, successively larger from the first to the third, 

 the largest (third) with two little notches on its broad outer 

 edge ; three serrations on the margin beyond the third lobe ; 

 anal orifice a considerable distance from the hind end j circum- 

 genital glands present, median of 2, anterior laterals 5, poste- 

 rior laterals 3, the lateral groups forming a nearly continuous 

 row. 



Hah. Frontera, Tabasco, Mexico, June 28, 1897, on leaves 



