Studies on Arthropods. I. 



into a triangular process, and that the two anterior pairs of 

 tarsi have no dorsal furrow. It agrees with Stylocellus and 

 differs from Ogovia in having the claws on fourth pair of tarsi 

 much longer than first pair, and in some features in the palps, 

 as their femoral part is not expanded and conspicuously longer 

 than the trochanter, their tibial part longer than the tarsus. 

 It differs from both genera in having the membranous part 

 of the maxillary lobe of first coxae developed in a peculiar way, 

 in the aberrant terminal part of the coni foetidi, in having 

 no trace of dorsal keel on the cephalothorax, finally in the 

 antennulae, as the first joint has a single large tubercle on the 

 lower side, and the fixed finger has two kinds of teeth. 



The single species known is in general aspect somewhat similar 

 to Siro, though it decidedly belongs to the other subfamily. 



Parogovia sironoides n. sp. 



PI. IV, figs. 2 a 2l. 



Body (fig. 2 a) moderately thick, more than three-fourths 

 as long again as broad, much broader than deep. 



Cephalothorax almost as long as the abdomen (fig. 2 a), 

 anteriorly without real lateral excavations and without any 

 median keel; the front lamina of moderate size, triangular, 

 broader than long, subacute. The posterior transverse furrow 

 is much arcuate, very feebly developed excepting at the middle, 

 where it is more distinct and flatly curved, and here its distance 

 from the furrow limiting the abdomen is three or four times 

 shorter than the length of first abdominal segment. The sur- 

 face of cephalothorax is rather densely granulated; the gra- 

 nules are well developed, not confluent; the lower side of the 

 coxae more finely granulated. 



Coni foetidi nearly as long as broad; the end is rounded 

 and shows, seen from above, an oblong and oblique, smooth, 

 shining area. 



