58 Mr. R. I. Pocock on new 



Heterostoma ruhripes (Brandt) , var. grossipes^ var. nov. 

 (PI. IV. figs. 3, 3 a.) 

 Heterostoma grossipes, Newport, MS. 



Body slender anteriorly, stout posteriorly. 



Colour castaneous, legs paler. 



Head-'plate cordate, a little wider than long, punctured. 



Antennce (broken) with the four basal segments bare. 



Maxillary sternite punctured, anteriorly depressed j pro- 

 sternal plates long, each furnished with three strong teeth, 

 whereof the internal is subdivided. 



Tergites smooth, from the third bisulcate, from the fifth 

 marginate. 



Sternites smooth, the anterior ones raedianly impressed 

 posteriorly, ? bisulcated (the plates being much wrinkled by 

 drying). 



Anal somite. — Tergite wide, of normal form ; pleurce of 

 moderate length, closely porous, with two close-set apical 

 spines, about five minute superior spines, and two lateral 

 spines ; sternite narrowed behind, with emarginate hinder 

 border ; legs very stout, the width of the segments being equal 

 to half their length ; femur armed with eight or nine spines 

 (including the short spiniform process), five or four on the 

 upper inner edge and inner surface, two on the under inner 

 edge, and two on the under outer edge ; claw with basal 

 spurs. 



Legs with claws and first tarsal segment spurred. 



Length 80 millim. ; width of head 7 millim., length 6*3 ; 

 width of anal tergite 8" 5 ; length of anal leg 19 ; length of 

 femur 7, width 3*6 ; length of patella 5'5, width 3. 



A single specimen from Sunday Island. 



I consider this form to be merely a variety of H. ruhripes^ 

 Brandt. It differs from the typical H. ruhripes in having 

 thicker anal legs with fewer spines on the femur. 



Ethmophoeus, gen. nov. 

 (rjBfios, a sieve, and (pepa, so called from the form of the stigmata.) 



It is needless to characterize this new genus at length, since 

 it only differs from Heterostoma in the form of its maxillary 

 feet. 



In Heterostoma the prosternal plates are enormously large 

 and strongly dentate and tlie femoral segment of the appen- 

 dage has no internal tooth. 



In Ethmophorus^ on the other hand, the prosternal plates 



