304 On Aquatic Carnivorous Coleoptera or Dytiscidce. 



tarsi a little incrassate, the apical ventral segment is truncate, but distinctly 

 jiroduced in the middle and thus slightly sinuate on eacli side. In the female the 

 epipleurc^ are simple, and the last ventral segment has a much produced middle 

 lobe, and the portion on each side of this is nearly truncate. 



Brazil. 5.59. 



Group 6. 



138. Laccophilus pellucidus, n. sp.— Latus, parum convexus, testaceus, unicolor 

 nitidior, subtilius reticulatus ; prosterno basi in medio perparum elongate. Long, 

 5t, lat. 3t, m.m. 



This species is as long as L. luridus, but is quite different in form being very 

 much broader in front and comparatively little convex. The base of the thorax in 

 the middle is very little acuminate ; the hind tarsi are very broad. The male 

 tarsi are not much incrassate, but their clothing beneath is more largely developed 

 than usual, the palettes of the under surface being quite conspicuous, and placed on 

 elono-ate hairs, and form four transverse series ; the apical ventral segment is 

 much abbreviate, the hind margin rather deeply sinuate on each side, and very 

 broadly rounded in the middle, The female I have not seen. 



South Africa ; Bedford district, Caffraria. 1 1 75. 



139. Laccophilus luridus, Schaum, M.C. — Late ovalis, apice latius rotundatus, sat 

 nitidus, testaceus, elytris vix obscurioribus, immaculatis. Long. 5J, lat. 3i m.m. 



The male has the front and middle tarsi a good deal incrassate ; the apical ventral 

 seo-ment is truncate, but a little produced in the middle and sinuate on each side ; 

 in the female the central lobe of this segment is elongate, and its hind margin is 

 very slightly reflexed. The broad form, large size, and almost completely immacu- 

 late elytra, make this species distinguishable at a glance. 



Eg}T)t. 5G5. 



140. Laccophilus immundus, n. sp. — Ovalis, elongatus, sat angustus, minus 

 nitidus, fusco-rufus, supra coriaceus, et in elytris subtilissime punctulatus. Long. 

 4i, lat. 2| m.m. 



I have seen but a single female of this very distinct species, the sculpture of it 

 resembles that of Laccophilus undatus, (No. 123) the prosternal process is ho-svever 

 elono-ate in the present species : the apical ventral segment is truncate and but little 

 produced in the middle. 



Cape of Good Hope, (Capetown) from Castleiiaii's collection ; I do not feel quite sure that the label of 

 the locality of this species is correct. 595. 



