CANARIAIf COLEOPTEEA. 79 



than a geographical state of the Cercsi/i. If however they should 

 prove eventually to be clifFerent, I would then (having already given 

 a diagnosis) propose for them the specific name of persimills. The 

 only examples of it which I have yet seen from these islands were 

 captured by myself in the brackish lake of Januvio, towards the 

 south-west of Lanzarote, during my visit to that remote spot, in 

 company with the Rev. R. T. Lowe, in Mai*ch 1859. 



124. Hydroporus tessellatus. 



Hydi'oponis tessellatus (D<J.), Aiibe, Ili/drocanth. 516 (1838). 



Habitat in rivulis Cauarige, TeneriffiB, Gomer£e et Palmse, vulgaris. 



I have but little doubt that the present Hydroporus is the tessel- 

 latus of Aube, described from a single example in Dejean's collection. 

 Nevertheless there are at least two important characters omitted in 

 Dr. Aube's diagnosis, — which however, since they are both of them 

 somewhat variable, is not surprising ; considering, too, that he had 

 but a solitary individual to judge from. I refer to its minutely pu- 

 bescent surface, and its slight tendency to be very obscurely subdenti- 

 culated (more or less expressed in different specimens) towards the 

 apex of its elytra. It is nearly allied, in general contour and affinity, 

 to the Madeiran H. vigilans ; but differs from it in being on the 

 average a little larger and more oblong, in its surface being deli- 

 cately pubescent, in its head and prothorax being darker (with the 

 latter much less rounded at the sides and having the posterior angles 

 less obtuse), and in its elytral lines (which are sometimes almost 

 obsolete) being less developed. The H. tessellatus is an abundant 

 insect in nearly all the streams of Grand Canary, Teneriffe, Gomera, 

 and Palma, occurring independently of elevation. In Gomera it was 

 likewise taken by Mr. Gray and Dr. Crotch (the latter of whom met 

 with it also in Teneriffe and PaLma). 



Genus 41. LACCOPHILUS. 



Leach, Zool Misccll. iii. 69 (1817). 



125. Laccophilus inflatus, n, sp. 



L. lato-ellipticus, convexus ; capite prothoracequc dilute rufo-testa- 

 ceis, illo latiuseulo, hoc postice in medio breviter producto ; elytris 

 subolivaceo-fuscis, per limbum plus minus pellucidis, maculis irre- 

 gularibus indistinctis obliquis ad marginem pallido-ornatis ; an- 

 tennis palpisque paUido-testaceis, pedibus piceo-testaceis. — Long. 

 Corp. lin. 2-2\. 



Habitat in aquis Canarise, Teneriffse et Gomerae, hinc inde baud in- 

 frequens. 



