BBITISH ASSOCIATION. 281 



Family.— ITEAILE. 



Genus. — Phtlotjgeia (<f>t\os vypoi) (mihi). 



1. — Philougria celer (mihi). Plate XXII., Tig. L 



Body semi- flattened, elliptical, perfectly smooth and shining. Head 

 oval, twice as broad as long ; neither lateral nor median lobes extant ; 

 antennal plate attaining to frontal line. Eyes small, oval, situated at 

 posterior angle of head. Internal antennae small, inconspicuous, three 

 (two ?) jointed. External antennae moderate in length, generally curved, 

 folded in form of (tsj ). Peduncle five-jointed, attached to detached 

 segment (epimeral?) of ring, hence apparently six- jointed. First arti- 

 culation very short, transverse; second, obtusely triangular, longer 

 than first ; third, globular equal to second ; fourth, elongated, slender, 

 sides parallel, equal to second and third conjoined, its exterior superior 

 angle truncate, inner angle ending in a long hollow spine ; fifth, slen- 

 derest, and slightly longer than fourth, sides nearly parallel, internal 

 margin produced into four angular eminences, each of which bears a 

 short spine, external angle terminating in a filament, external border 

 hairy. Tige five-jointed, filamentous ; articulations cylindrical, gradually 

 tapering; first, short; second, third, and fourth, equal; fifth equal- 

 ling second, third and fourth conjoined; terminating in a filament; 

 perfectly free from hairs or spines. Coxae of cephalothoracic segments 

 well marked. Segments of cephalothorax : first, much broader than 

 head, second and third gradually broader ; third and fourth equal ; 

 fifth, sixth, and seventh gradually decreasing in breadth; seventh 

 as broad as first. Posterior margin of first three rings convex down- 

 wards; fourth and fifth, median portion convex downwards, coxae 

 concave upwards ; sixth and seventh rings concave downwards, 

 their coxae quadrilateral, strongly angular, suture well marked; 

 coxae of the seventh extending half-way down fourth abdominal 

 ring ; raised transverse border along margin of each ring ; a bor- 

 der of small spines along lateral edges of coxae (visible under \ inch 

 power). Abdominal segments: first, semilunar, very linear, coxae nearly 

 obsolete, covered by those of seventh cephalothoracic segment : second, 

 linear, coxae rounded, uncovered by seventh cephalothoracic ring; third, 

 fourth, and fifth, each equal in breadth to first and second conjoined; 

 coxae well marked and curved, inferior border of entire segment con- 

 vex medianly and deeply concave externally, so as to form a projecting 

 angle, gradually decreasing in breadth from third downwards ; terminal 

 ring deeply concave over insertion of last false feet, the segment being 

 here linear, coxae nearly obsolete, medianly produced, truncately trian- 

 gular, apex deeply emarginate; total length of ring about twice that of 

 fifth ; the rings gradually increase in length from one to six. Abdo- 

 minal false feet: last pair uncovered, articulated in excavated posterior 

 margin of last ring. Peduncle, and ischium, and accessory filament, as 

 in genus, q. v. 



