LACCOPHILUS RITSEMAE. 209 



NOTE XXXI. 



THE NEW DYTISCIDAE AND GYRINIDAE COLLECTED 

 DURING THE RECENT SCIENTIFIC SUMATRA- 

 EXPEDITION, 



DESCRIBED BY 



Dr. M. RÉGIMBART. 



DYTISCIDAE. 

 1. L accophilus Ritsemae, sp. n. 



Oblongo-ovalis , postice paululum attenuatus, subtilissime 

 reticulatus , infra fusco-ferrugineus , antennis pedibusque 

 testaceo-ferrugineis ; capite ac prothorace fulvis , hoc ad ba- 

 sin leviter infuscato; elytris nigro-f uscis , crebre et irregu- 

 lariter f ulvo-irroratis , ad basin fascia lutea transversa et 

 undulata, post medium aliquot lineolis transversim dispo- 

 sitis ornatis, ad apicem et latera anguste fulvis. — Long. 

 SVs mm. 



Closely allied to Laccophilus transversalis Régimb. ') from 

 which it differs by the fulvous head and pro thorax ; the 

 latter has no black spot on the anterior border, and on 

 the middle of the posterior border only a faint, light- 

 brownish band. 



A single specimen, captured in November 1877 at Moe- 

 ara Laboe. 



1) Annales de la Soelété antomologique de France. 5me ser. torn. VII (1877) 

 p. 357, n° 5. 



Notes from tlie Leyden ]Miiseuiai, Vol. II. 



15 



