1922] On some Trophobiotic Coccidce from British Guiana 147 



collar, the usual shape of the plates, from above, half ovate, 

 but varjang quite a little according to the pressure on the plate; 

 each plate quite deep, with about 15 to 17 scattered seta? dorsally 

 and apically, these frequently broken off, an indeterminate 

 luunber, apparently three, of ventral ridge setae, two fringe setse 

 ])laced close together at center of fold in membrane, and three 

 to five hypopygial setse along middle of membrane beneath 

 i'ringe setse; anal ring small, oval, with ten small seta3 and some 

 large pores. 



Larva. — Stout oval, flat, average length 821ju, average 

 width 571/x; antennae slender, elongate, 6-segmented, the third 

 very long; legs slender, claw without denticle, digitules slender, 

 those of claw slightly knobbed, those of tarsus hair-like; spi- 

 racular spines occuring singly, stout, somewhat tapering; on 

 abdomen, at least, with two dorsal rows of minute pores on 

 each side of the bod}^; ventrally with a submarginal row of 

 relatively long hairs and a similar parallel row some distance 

 in from the margin: anal plates elongate, each with a. long apical 

 seta, two small subapical setse and a subbasal seta; with one 

 pair of fringe setse. 



This species has been described from the following lots of 

 specimens: In branches of Inga laurina, Mayaguez, Porto Rico, 

 March, 1915, collected by R. H. Van Zwaluwenburg (holotype 

 and paratypes); on "guama", San-Juan, P. R., Nov. 1912, col- 

 lected by W. V. Tower (paratypes); beneath bark of Ilemato- 

 xijlon campechianum (logwood), Botanic Garden, St. George, 

 Grenada, Nov. 13, 1918 (A-971) and Nov. 19, 1918 (A-1021), 

 Friendship Estate, Tobago Island, Nov. 7, 1918 (A-912), and 

 on the Savanna, Port-of-Spain, Trinidad, Nov. 23, 1918, all 

 collected by Harold Morrison (paratypes), and in the cavities 

 of the stems of Triplaris surinamensis Chanc.with Pseudomyrma 

 sp. nov. (allied to Ps. triplaridis Forel), collected by Dr. W. M. 

 Wheeler at Camaria, British Guiana (paratypes). In all ins- 

 tances where information is available, the species is reported as 

 receiving the attention of some species of ant. 



The types are in the U. S. National Collection of Coccidae. 



