OF NEW ZEALAND. 1399 



groove rather fine and abbreviated, basal fossae broad and shallow, 

 the plica near each basal angle well developed, the angle itself 

 rectangular ; between the fosss. there are some indistinct punctures, 

 and near each side there is a slight flattening of the surface. Elytra 

 oval, a good deal broader than the thorax, the broad lateral margins 

 become thinner towards the base and apex, but the shoulders are 

 broader than the base of the thorax, the basal region is slightly 

 raised, the scutellum seems as if it were only a portion of this ; the 

 striaB are fine, not very evenly impressed, and are only slightly 

 punctate, the posterior carina is distinct, and there are three small 

 punctures on the third interstice. Tarsi, anterior, with the two 

 basal joints a little produced at the inner extremity. Palpi 

 acuminate. 



Underside glossy-brown, coxae and trochanters red. 



Allied to No. 1145. The interocular punctufes are distinctive. 



S . Length, 2^ ; breadth, 1^- lines. 



Port Hills, Christchurch. I owe my specimen to the kindness of 

 Mr. H. Suter. 



Group— BEMBIDIID.^ . 



Tachys. 



2411. T, (•*) oreobius, "-s. Sliininq, sordid rufo-testaceous, 

 elytra more or less infuscate, legs, antenna?, and palpi pale-yellow. 



Body moderately convex. Head subovate, frontal impressions 

 moderate, the intervening space somewhat convex ; from the point 

 of antennal insertion a fine oblique raised line extends backwards, 

 below this the minute eyes may be seen. Antennce reaching beyond 

 the base of the thorax, slender, with fine greyish pubescence, the 

 second joint quite as long as the first, and longer than the third. 

 Thorax much broader than it is long, its sides finely margined and 

 moderately curved, widest at, or just before, the middle, more nar- 

 rowed behind than in front but hardly at all sinuate, the shape 

 therefore is subquadrate ; posterior angles obtuse, the base mar- 

 gined at the sides ; basal fovete small, placed close to the hind 

 margin but distant from the sides, the dorsal groove indistinct ; I 

 see but one lateral seta, which is situated just before the middle. 

 Scutellum invisible. Elytra a good deal broader than the thorax, 

 not truncate behind, their sides moderately rounded ; lateral mar- 

 gins broad, narrowed near the apex, continued inwards towards the 

 middle of the base and forming rounded shoulders ; they are without 

 distinct sculpture above, but on each elytron a series of minute punc- 

 tures may be seen near the side ; they bear some short, erect, greyish 

 hairs. Legs stout, the anterior pair remarkably so, the/e;;torft much 

 inflated but flattened underneath, the tibice are dilated towards the 

 extremity, and the usual inner notch is situated rather low down ; 

 the tarsi (male) have the basal joint much enlarged and of oblong 

 shape, the second also is dilated, but much smaller, the third and 

 fourth are small, the claws slender ; the posterior femora are simple, 

 their trochanters are large. 



