136 Psyche [August 



of triangular pores, but some of those on the thorax often 

 greatly reduced or entirely wanting; the numbers of spines in 

 the different cerarii showing the following range in four speci- 

 mens: I (anterior), 3-4; II, 3-4; III, 2-3; IV, 0-3; V, 1-3; 

 VI, 0-2; VII, 1-5; VIII, 0-2,; IX, 2-4; X, 2-4; XI, 3-4; XII, 

 2-4; XIII, 2-4; XIV, 4-5; XV, 4-5; XVI, 6-9; XVII (anal 

 lobe), 11-22; in mounted specimens, with the posterior two or 

 three cerarii on each side dorsal and the remainder ventral; 

 apex of abdomen not produced into lobes; ventral chitinous 

 thickening elongate, bearing several setae; apical setse about 145^ 

 long; longest and anal ring seta about 93/i long; anal ring of 

 normal form and construction, with inner and outer rows of 

 pores but with the setse more numerous than in other species of 

 the genus, there being three larger primary setse and from five to 

 ten smaller supplementary setse on each half of the ring,the smaller 

 setse about half the length of the larger; dorsally with small 

 triangular pores only, these scattered rather uniformly over the 

 surface except along the body margin and at the cerarii where 

 they are more numerous; ventrally with the triangular pores 

 over most of the surface, with a few large, circular, multilocular 

 disk pores around the genital opening, with two median trans- 

 verse rows of tin}^ tubular ducts just anterior to these, and with 

 a very few disk pores at the spiracular openings; cerarian 

 spines conical, varying greatly in size; body with numerous, 

 but scattered, slender setse, these averaging larger dorsally and 

 most abundant along the body margin; with a single, large 

 quadrate median ventral cicatrix posterior to the hind legs_ 



Immature Stages. — None available for examination. 



This species has been described from five specimens with 

 the following data, according to Dr . Wheeler's notes: 



"No. 87. Barakara, B. G. July 15, 1920. In the cavities of 

 the stems of Cecropia angulata I. W. Bailey. The ants in this 

 Cecropia were a species of Azteca not yet identified." (Holotype). 



"xNo. 89. Barakara, B. G. July 15, 1920. In the cavities of 



