1886.] NATURAL SCIENCES OF PHILADELPHIA. 63 



transversely linear, about an eighth the length of the hreadth ; 

 graduall}^ becoming inverted saucer-shaped or scutellate, and 

 about one-fourth the length of the breadth. Posterior segments 

 more quadrate, slightly widening behind, about 0'75 mm. long and 

 from 1- to 1-5 mm. broad. Last segment longest and rounded. 

 Genital apertures marginal. 



March 30. 



Mr. Charles Morris in the chair. 



Twelve persons present. 



Prof. J. C. Arthur was elected a correspondent. 



The following was ordered to be printed : 



