490 On Aquatic Carnivorous Coleoptera or Dytiscide. 
q ‘Pp 7] 
rounded. Elytra narrow and elongate, rounded at the sides, narrowed and 
acuminate behind, sparingly punctured, the punctures more distinct towards the 
extremity than at the base ; abdomen terminated by a long pointed spine directed 
backwards and upwards. 
Egypt—a single specimen, (probably from the neighbourhood of Cairo) sent by Dr. Millingen. 603. 
658. Methles rectus, n. sp.—Rufescens, sat nitidus, glaber, capite thoraceque fere 
impunctatis; elytris sparsim sat fortiter punctatis ; subtus fere impunctatus ; 
prothorace lateribus rectis, angulis posterioribus rectangulis. Long, 32, lat. lz m.m. 
Closely allied to the preceding species, but rather larger and with the thorax 
quite straight at the sides ; the mucro terminating the body is much shorter, but 
this may perhaps not be a specific character. 
Mesopotamia, also a discovery of Dr. Millingen’s. 604. 
659. Methles punctipennis, n. sp.—Suboblongus, sat nitidus, glaber, capite thorace- 
que fere impunctatis, hoc tamen versus latera punctis paucis ; elytris crebre fortiter 
punctatis ; corpore subtus fere impunctato ; thorace lateribus paululum rotundatis, 
angulis posterioribus obtuse rectis. Long. 32, lat. 1} m.m. 
Very similar indeed to the other two species, but with much more distinct 
punctuation on the elytra. 
Tropical Africa, (Lagos, Ashantee). 600. 
Ill. 3.—Tribe COLYMBETIDES. 
Last abdominal stigma of small or moderate size ; outline of eye in front invaded 
by the free margin of the clypeus, so that it is notched or emarginate not circular ; 
size moderate, 20 m.m. of length being attained by only three or four species. 
Posterior femora with aggregated cilie arranged in a linear group at the 
AGABINI. 
postero-external angle. 
(Vide p. 491.) 
( Upper and inner edge of first ventral 
| plate without transverse folds or 
i grooves: size rather below the aver- 
Genera, 54 to 60. 
( ) 
———_—_ —_— 
- Vide p. 561. 
age, rarely attaining 10 m.m. of F 
Posterior femora without aggregated length. 
cilie at the postero-external angle. | 
| Upper and inner edge of first ventral ) 
plate with transverse folds: size (CoLYMBETINI. 
| quite the average, usually attain- {| (Vide p. 605.) 
Lt ing 10 m.m. or more of length. J 
es 
