50 T. D. A. COCKERELL. 



(3.) Lecanium longulum Dougl. — Mr. C. A. Barber sent me this 

 from Antigua, where it infests pigeon-peas. Later, I found it abun- 

 dantly, mixed with L. olece, on the branches of a tree in Kingston. 

 The tree, which was not identified, has 3-foliolate leaves, the leaflets 

 lanceolate, entire, pubescent above, beneath pale, with strong veins. 

 I also have specimens received from Mr. Newstead, found on Eu- 

 phorbia (under glass) in Cheshire, England, Many of the Antigva 

 specimens show holes where parasites have escaped. 



When the scales become dry, they curl up and change color. Such 

 specimens might be, referred to Signoret's second series, but on the 

 whole, it seems best to place the species in the first series, having 

 regard to all its characters. The following notes are additional to 

 the information given by Douglas in his descripti(m : 



Scale (Jamaican specimen) about 4 mm. long and 2 mm. wide, of the 

 flattish type, but fjiirly convex, dorsum rounded, not keeled, shiny. 

 Color, when alive, appearing dark grayish ; when removed from the 

 plant and seen with a lens, it has a very pale ground color, tinged with 

 pinkish or yellowish, and much gray markings. To be more precise, 

 there is a rather broad dorsal stripe of pinkish, bordered first by a pale 

 yellow line on each side, which is broken up into spots, and outside 

 that by a dark gray line. From the last run numerous blackish 

 lines, radiating towards the margin, but not reaching it. There is, 

 outside the dark gray line, a tendency to similar lines, which, cross- 

 ing the radiating ones, produce a somewhat tessellated effect. The 

 old scales become light brown. 



The anal plates are brown, rather broad, so that together they 

 form a square. Eyes dark purple. 



The margins of the scale have simple hairs, rather longer than in 

 some species ; the marginal spines are peculiar, being sunk in squared 

 incisions, from which they do not usually project. There are two 

 spines in each incision (four pairs of spines in all), which are either 

 short and equal, or one is longer than the other, and projects beyond 

 the incision. 



The posterior cleft is pinkish in fresh specimens ; its sides are 

 contiguous, but separate slightly after boiling in caustic soda. After 

 boiling in soda the scale appears closely and conspicuously pitted 

 with gland-spots. 



The antennae are described and figured by Douglas (" Ent. Mo. 

 Mag.," 1887, p. 97). It appears to me that there are eight joints, 

 as described by Douglas, although Maskell's L. chirimolice, which is 



