XXV. — A Revision of the Dytascid-genus 

 Lacconectus (Motsch.) By A. Zimmermann. 



Through the kindness of Dr. E. Mjoberg, I have received 

 for determination a small collection of Dytiscids belonging to 

 the Sarawak Museum. The material comprises besides some 

 common species, two specimens of the apparently very 

 rare Pleurodtjtes dinentoides Sharpe and numerous specimens 

 of Lacconectus fulvescens Motsch., previously recorded only 

 from India and therefore new to Borneo. 



This zoo-geographical statement has given me reason to 

 revise the interesting genus and to give a key to all known 

 species, adding also the description of a new form. 



A . — Dorsal side nearly smooth or only very finely punctured 

 Group 1 . 



B. — Dorsal side with dee[), rounded punctures or distinctly 

 transversely striated Group II. 



Group I. 



1. Elytra as well as the whole body, brownish red. 



2. Size large, 4.3—5 mm. 



3. The punctures of elytra, though fine, yet quite 

 recognizable by use of larger magnification. Striii^ of elj^tra 

 strong ; besides the two middle ones, the punctures of 

 which are very densely placed, there are three more stria?, one 

 near the suture, consisting of only very few punctures, a 

 second one in the middle and a third one near the lateral 

 margin. 



