On Aquatic Carnivorous Coleoptera or Dytiscidce. 299 



The marks of the elytra in this species are distinct and complicated, hut vary- 

 somewhat ; the basal portion of the elytra is pale, but has a dark spot near the shoulder 

 and another near the suture, the pale basal portion is very irregular in form, and 

 the dark spots in it are more or less connected by prolongations with the medial 

 dark marks, at the middle of the side the dark part is encroached on by a pale spot, 

 and there is a very irregular more or less interrujjted pale fascia beyond the middle, 

 and the apex itself is pale. The margins of the dark portions are darker than their 

 centres, the colour there beinof more dilute. The male has the front and middle tarsi 

 rather distinctly incrassate, but has no coxal file. In each sex the apical segment 

 is without sinuation at the sides. 



North America, Pennsylvania ; Amazons Valley : but there is doubt whether tliis latter locality be 

 correct. 55-5. 



124. Laccophilus obesus, n. sp. — Ovalis, latiusculus, sat convexus, pernitidus, 

 supra creberrime sub-obsolete punctulatus, castaneus, capite thoracenue rufo-testa- 

 ceis, hoc anterius medio obscuriore, elytris signaturis apiceque pallidis. Long. 4, lat. 

 2t m.m. 



The pale marks of the elytra consist of some large basal spots which form a 

 transverse fascia, of a spot on the middle of the lateral margin, of a larger transverse 

 mark between this and the apex, and the apex also is pale. The only individual I 

 have seen is no doubt a male, though it possesses only very slight external distinctions, 

 its front tarsi, and the apical ventral segment being nearly simple, though there 

 is an excessively slight sinuation on each side of the middle of the latter. In the 

 collection of the Brussels Museum there exists however a female from Minas Geraes , 

 v/hich is either a variety of this species or a very closely allied one ; it has the 

 apical ventral segment more elongate and without the least sinuation, and the 

 epipleural fold shows a depression for some distance before the apex. 



South America, Caj-enne. .544. 



125. Laccoi^hilus latipes, n. sp. — Ovalis, sat convexus, pernitidus, supra obso- 

 letissime punctulatus, piceus, antennis, pedibus anterioi'ibus, capite, prothoracis 

 lateribus elytrisque signaturis conspicuis apiceque testaceis. Long. 4, lat. 2| m.m. 



The species is closely allied to the preceding, but is darker in colour, with the 

 upper surface less visibly punctulate, and the markings of the elytra (which are 

 however quite the same in their distribution) very conspicuous. The pale colour 

 at the sides of the thorax extends in a very indistinct manner across the middle. 

 I have seen only two individuals, which are males, and show quite the same 

 characters as L. obesus. 



South America, Parana. 545. 



TBAN$. KOT. DUB. SOC, N.S. VOL. II. ' E 



