82 MAND7BULATA. — COLEOFTEHA. 



Sp> 37. fenestratus. Oblongo-ovatus, convexus, nigro-osncus, poste?~iiis attenuatus, 

 elytris lineolis duabus fenestratis, margine corporeque ferrugineis. (Long, 

 corp. 5 — 6 lin.) 



Dy. fenestratus. Fabi-icius.-— Co. fenestratus. Steph. CataL p. 51. No, 515. 



Oblong-ovate, convex, brassy-black, attenuated posteriorly : head broadly fer- 

 ruginous anteriorly, with the spots on the crown obsolete : thorax with the 

 lateral margin more or less rufo-ferruginous : elytra convex, with the lateral 

 margins broadly ferruginous, each with three longitudinal rows of irregularly 

 dispersed impressions, and a little beyond the middle, within the margin, p 

 obsolete narrow longitudinal streak, and a second less distinct within the apex , 

 body glossy rufo-ferruginous beneath : legs ferruginous. 



Var. #. With the upper surface pitchy-black, beneath pitchy. 



Not uncommon but local near London. " Croydon Canal." — 

 Dr. Leach. " In Milden-hall drain, near Littleport, Cambs." — 

 Rev. L. Jenyns. " Parley Copse. " — J. C. Dale, Esqf 



Sp. 38. ater. Oblongo-ovatus, niger, convexus, posterius attenuatus, elytris lineolis 

 duabus fenestratis, antennis pedibusque anterioribus ferrugineis. (Long. corp. 

 6— 7 lin.) 



Dy. ater. Be Jean. — Co. ater. Steph. Catal. p. 51. No. 516. 



Oblong-ovate, black, convex, posteriorly attenuated : head with the mouth dull 

 ferruginous, and two more or less distinct ferruginous spots on the crown : 

 thorax rather sinuated behind ; above convex, the lateral margins obscurely 

 pitchy-ferruginous : elytra large, oblong-ovate, slightly dilated in the middle, 

 attenuated towards the apex, very convex, shining black, or dull aeneous, with 

 the outer margin anteriorly pitchy-brown ; on the disc of each elytron are 

 three irregular rows of minute impressed dots ; a little beyond the middle, 

 within the margin, is a narrow longitudinal transparent pale testaceous streak, 

 and an indistinct oblique one towards the apex : body pitchy-black beneath, 

 with the apex and the margins of the abdominal segments frequently rufescent: 

 four anterior legs rufescent, posterior pitchy-black. 



The colour of the upper surface varies in being somewhat piceous, and of the 

 under by occurring of a pale testaceous : probably immature. 



Not uncommon in ponds throughout the metropolitan district; 

 also in Norfolk, Dorsetshire, &c. " Sundridge, Kent."— Mr. 

 Ingpen. 



Sp. 39. obscurus. Oblongo-ovatus, niger, convexus, elytris maculis duabus fene- 

 stratis obsoletiusculis, corpore subtus, antennis pedibusque piceis. (Long. corp. 

 6 lin.) 



Dy. obscurus. Marsham.— Co. obscurus. Steph. Catal. p. 51. JVo. 517. 



Oblong-ovate, deep black, convex : head and thorax as in Co. ater : elytra very 

 convex, obsoletely striated, with two very indistinct fenestrated spots, one on 

 the lateral margin, a little beyond the middle, the others at the apex : body 

 beneath, antenna? , and legs pitchy. 



