380 Dr. D. Sharp on 



the archipelago ; it was found at Awoinoii, at Chiuzenji in 

 August, and at Nikko in June. 



TacMnus trifidus^ n. sp. 



Niger, nitidus ; antennarum basi pedibusquc testaceis ; elytris ad 

 basin late vageque rufis, prothoracis lateribus angustissime piceis ; 

 prothorace snbtilissime parce punctulato, elytris crebrius fortius- 

 que punctatis. 



Long. 6 millim. 



Antennae rather short and moderately stout, the two basal 

 joints yellow, the others dark, tenth joint about as long as 

 broad. Thorax and elytra finely strigulose, the former only 

 finely punctate, the latter red about the base and shoulders. 

 Hind body shining, finely and moderately closely punctate. 



This species closely resembles T. hasalis, Er,, but the 

 female characters are totally different. In this sex the last 

 dorsal plate ends in four acuminate spines, the lateral inter- 

 space being nearly twice as long as the middle one ; the 

 lateral spines project slightly further backwards than do the 

 middle pair. The last ventral plate is six-toothed, the lateral 

 tooth and the intermediate on each side being elongate and 

 slender ; the lateral tooth is in fact considerably longer than 

 the median pair. 



]n the male the last dorsal plate terminates in two rather 

 short distant teeth ; the external angle of the plate is not 

 dentate and only projects as far back as the base of the notch 

 separating the two middle teeth ; the last ventral plate forms 

 two extremely large lacinise, a little incurved at their apices ; 

 the hind margin of the preceding segment is broadly but 

 slightly cmarginate and somewhat deflexed, the surface in 

 front of it being flat and smooth ; there is also a corresponding 

 smooth space on the preceding segment. 



This has only been met with in the main island, six indi- 

 viduals having been found at Kiga, Miyanoshita in May, and 

 Nikko. 



TacMnus hidens^ n. sp. 



Angustulus, niger, nitidus, antennarum basi, pedibus prothoracisque 

 lateribus testaceis ; elytris ad hnmeros rufis ; abdomine crebrius 

 subtiliter punctulato. 



Long. 6 millim. 



Antennae slender, the four basal joints yellowish, the rest 

 daiker, tenth joint distinctly longer than broad. Thorax 



