142 Psyche [August 



angular disk pores, these scattered rather uniformly over the 

 body surface; ventrally with these pores distributed uniformly 

 except at margin close to and in the "cerarii," with some 

 large circular, multilocular disk pores around the genital 

 opening and in narrow transverse rows on the two segments 

 anterior to this, with a very few, tiny tubular dvicts near the 

 genital opening and with much larger, short tubular ducts in 

 clusters just within the "cerarii" on the last five or six abdominal 

 segments, these ranging from four to eight in number in the 

 three clusters anterior to the apical but with only one or rarely 

 two in the one or two anterior groups, the apical group median, 

 usually with about twelve pores in it; derm dorsally with fairly 

 uniformly scattered, very slender, lanceolate setse, ventrally 

 with longer, slender hair-like setse; anal ring of normal form, 

 with inner and outer rows of pores and with three primary and 

 usuall}^ four smaller, secondary setse on each half, longest anal 

 ring seta about 110/x; with a single median quadrate ventral 

 cicatrix posterior to the hind legs. 



Immature stages. — Xone available for examination. 



This species has been described from four mounted and a 

 few unmounted specimens collected by Dr. Wheeler with the 

 following note: 



"Xo. 79. Barakara, B. G. July 15, 1920. Taken in a 

 large colon}- of the ant Tranopelfa gilva Mayr, under the bark 

 of a living tree. The white coccids were present in great numbers 

 over the whole surface of the wood. The ant is usually sub- 

 terranean, its nest under bark being very exceptional." 



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



In the multiplication of the anal ring setse is found a con- 

 dition exactlj^ comparable to that in Pseudococcus rotundus, just 

 described, and it is also similar to the structural modifications 

 of the anal ring in certain other related forms known to be pro- 

 tected and attended by ants, such as Lachnodiella cecropice, 

 suggesting the possibility that the relationship between the ant 

 and mealybug may have had some influence on the modification 

 in structure. 



