A NEW SCALE INSECT ON RHIZOPHORA 



By T. D. A. COCKERELL 



Of the University of Colorado 



ONE TEXT FIGURE 



The mangroves (Rhizophora) , fringing tropical shores, have 

 been found to support a peculiar coccid fauna, including Cteno- 

 chiton rhizophorss Maskell in Australia, Mesolecanium rhizo- 

 phorss Cockerell in Brazil, and Chrysomphalus rhizophorse 

 Cockerell in Mexico. A new species is now to be described 

 from the Philippine Islands. 



Targionia merrilli sp. nov. Text fig. 1. 



Female scale 3 to 3.5 millimeters in diameter, flattened, some- 

 what convex, circular, pale gray; first skin near margin, ap- 

 pearing as a small black nipplelike prominence. Young scales 

 reddish, with the first skin orange. 



Fig. 1. Targionia merrilli sp. nov., a, female insect; 6, caudal end of female; c, Chrysom- 

 phalus rkizophorif Cockerell, caudal end of female. 



Female dark brown, about 2.5 millimeters long; cephalic 

 region broadly rounded, separated by a deep suture from the 

 wider thoracic region; no circumgenital glands; anal orifice 

 narrow and elongate, about 100 /j. from hind end; five pairs of 

 low lobes, the first broad and close together, but not touching; 

 second and third broad and rounded, the third sometimes dis- 

 tinctly notched; fourth very broad, with the margin variable, 

 but usually more or less flattened or tablelike in outline; fifth 

 rounded, widely separated from fourth; spines small and in- 

 conspicuous; squames very minute, rudimentary; at the bases 

 of the lobes are long claviform paraphyses or glands, one be- 



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