IS 



MELANDER AND BRUES. 



triangle on the vertex. Head with four closely approximated macrochaetae 

 at the middle of the front margin, two widely-separated ones near the 

 anterior corner of the eye directed inwards and two outwardly directed 

 ones near the posterior angles ; a series of small macrochaetae below and in 

 front of the eye. 



Thorax small, twice as wide as long, truncate before and behind ; sinu- 

 ate on the sides and narrowed behind, so that the pleurae are slightly visi- 

 ble from above. Thorax rather sharply arched above, and much narrowed 

 below on the sides. Dorsal surface with a pair of long macrochaetae just 



FIG. 7- Stethopathus occidentalis sp. nov., dorsal view. 



behind the anterior angles and four smaller marginal ones along the pos- 

 terior edge. 



Abdomen considerably swollen, but with large and strongly chitinized 

 dorsal plates. The first is only a narrow band, contiguous with the second 

 which is very large and contiguous with the third. The fourth and fifth 

 are separated by a white membrane such as covers the abdomen else- 

 where. Seen from above the abdomen is twice as wide as the thorax and 



