362 



Mr. D. Shar[)'.s Contributions to the 



along the middle and finely pubescent, the hind margin 

 slightly emarginate ; the 7th segment has a veiy elongate 

 and narrow notch. 



Ta])ajos ; two males. 



Obs. — This species bears an extreme resemblance to 

 S. tinctus, but is more slender ; it is more shining, has 

 the jnmctures on the elytra rather less crowded, so that 

 the interstices are more shining, and the limbs are still 

 shorter. 



5. Stenus vacillator, n. sp. iEneo-niger, subnitidus, 

 palpis flavis, antennis fiiscis, basi cum pedibus testaceis ; 

 li-onte bisulcata et anguste carinata ; thorace fortitcr trans- 

 versim rugoso-punctato ; elytris fortiter punctatis, mter- 

 stitiis nitidulis. Long. corp. fere 2 lin. 



Antenna) dusky yellow, infuscate tOAvards the extremity, 

 short; 10th joint about as long as broad. Head nearly 

 as broad as the elytra, densely pinictured, distinctly ex- 

 cavate, and with a very fine but distinct shining carina 

 along the middle. Thorax rather longer than broad, dis- 

 tinctly rounded at the sides, deeply transversely rugose, 

 the interstices narrow. Elytra about as long as the 

 thorax, rather coarsely and closely punctured, the inter- 

 stices wider on a space near the suture than elsewhere. 

 Hind body rather closely punctured, the basal segment 

 distinctly, the apical ones obsoletely ; the basal segment 

 very finely carinated in the middle, the following two only 

 very obsoletely carinate. 



Ta]iajos ; a single female. 



Obs. — I have some doubts Avhether the individual above 

 described be really distinct from «S'. cognatus. It is just 

 the same size as that species, but has the antenna; a little 

 shorter, the vertex more finely cai-inate, the interstices of 

 the sculpture on the thorax and elytra rather nan-ower, 

 and the carina} of the basal segments of the hind body less 

 distinct. These differences, however, are but slight, and 

 it is possible may be sexual or individual rather than 

 specific characters. I have, however, another female fi-om 

 St, l*:iul() which agrees in these respects with the ^S'. vacil- 

 lator, and is probably conspecific with it ; but as it departs 

 very slightly in one or two other resj^ects from the Ta])ajos 

 individual, I have drawn my description entirely from the 

 latter. 



G. St'-uns cursitor, n. sp. Gracilis, jeneo-niger, niti- 



