42 iJmversity of Michigan 



males and three females taken under bark of stump. Holo- 

 type, M. C. Z., 5,118. 



Trigoniuudae 



Trigomitlus Inuibricinus (Gerstaecker) 



United States Virgin Islands: St. Croix; July 16, 1914; 

 F. M. Gaige. "Collected in rotten logs in deep ravine in inte- 

 rior of island. This form was a very abundant one, and was 

 present under almost every stone that was turned over, as 

 well as in rotten wood, beneath loose bark, etc. It was noted 

 to be equally abundant on the high and very dry hillside and 

 in the damp ravine." In the vial with the Trigoniulus were 

 four specimens of Rhinooicus moniliconiis (Porat), to which 

 this note in part, therefore, applies. 



P01.YDESM01DEA 



EURYURIDAE 



Pycnotropis colombiensis, sp. nov. 

 PI. 17, Figs. 111-113 



When in full color the dorsum is blackish brown to black, 

 with the keels fulvous. Last tergite paler, brown or reddish 

 brown, across caudal border. Legs and antennae l^rown. 



A'ertigial sulcus sharply impressed, lying in a deep furrow 

 which anteriorly branches, sending a shallow furrow 

 obliquely out to each antennal socket. 



Collum narrower than the succeeding tergite. Lateral 

 lobes or keels wholly smooth, conspicuously narrowed and the 

 ends strongly convex. Surface between the keels divided into 

 polygonal areas like those of other tergites, these areas form- 

 ing four transverse, in which the areas of the first and last 

 are more or less incomplete. (PI. 17, Fig. in.) 



The polygonal areas of the tergites in general more pro- 



