4 University of Michigan 



Glomeridesmus orphnius, sp. nov. 



PI. I, Figs. T, 2 



This species in size exceeds the known West Indian spe- 

 cies, but approaches the Colombian G. porcdlus (Gervais and 

 Goudot). It would seem from Brolemann's description of 

 the form he identifies as porcclliis that this latter is a lighter, 

 chestnut species in which the head is alwa3's darker than the 

 body, and in which there is a definite pattern of lighter mark- 

 ings. In the present species the body is a uniform deep fus- 

 cous or black, with the head pale across vertex and labrum 

 and over the postantennal impressions ; there is no definite 

 pattern of lighter markings on collum, etc. 



Tlie tergites have the usual series of transverse striae or 

 ridges, most of which curve caudad on the lateral wings. 

 Lateral wings of tergites of posterior regions of body with 

 anterior angles evenly rounded, the posterior convex below 

 Ijut acutely, though but moderately, produced above, begin- 

 ning with the thirteenth or fourteenth, as shown in PI. i, 

 Fig. 2. Anterior tergites with both angles rounded (PI. I. 

 Fig. I). 



In dorsal view the collum is broader and nuich longer than 

 the head ; collum with lower end on each side narrowly 

 rounded, a deep stria al)Ove the end. (PI. i. Fig. i. ) Width, 

 2.8 mm. 



British Guiana: Labba Creek Sand Hills; July 27, 1914; 

 F. M. Gaige. One female, of which, unfortunately, the pos- 

 terior end of body is missing, taken in sandy soil of forest 

 floor. Ilolotype, 'M. C. Z., 5,046. 



