108 HYDROPHILIDA. 
punctate, and its two posterior sides are continued forwards towards the outside of 
the middle coxal cavities as fine raised lines. 
Like many others of the genus, the species varies a good deal in colour and a little in 
size and sculpture; but it and C. armatus may be distinguished from the other Central- 
American species of the genus by the fine raised lines which proceed forwards from the 
outer angles of the metasternal pentagon. 
11. Cercyon armatus. 
Ovalis, haud latus, convexus, nitidus, niger, prothorace ad latera anguste rufescente ; antennis, palpis pedibusque 
fusco-rufis; prothorace obsolete punctulato; elytris levissime striatis, striis subtiliter punctatis, apicem 
versus haud profundioribus ; prosterno altissime carinato, carina anterius rotundata. 
Long. 13, lat. vix ? lin. 
Hab. GuaTEMALA, Quezaltenango 7800 feet, Quiche Mountains 7000 to 9000 feet, 
Totonicapam 8500 to 10,000 feet (Champion). 
Palpi infuscate. Head rather closely and distinctly punctate. Thorax very indi- 
stinctly punctate. Elytra with extremely fine strize, which are finely but distinctly 
punctate; the strie are quite effaced at the apex, but the punctures are continued to 
the extremity; the two outer strie are rather more distinct than the others; the 
interstices are only obsoletely and sparingly punctate. The carina of the prosternum 
is remarkable for its great elevation, and its front angle is broadly rounded; the 
mesosternal lamina is coarsely punctate; the metasternal pentagon is finely punctate, 
and its posterior two sides are prolonged forwards as a very distinct line to the outside 
of the middle coxal cavity. 
Although very closely allied to C. subsignatus, I am not able to consider this insect 
conspecific therewith; the size is rather larger, the colour darker, the sculpture of 
the upper surface more obsolete, and the prosternal carina is remarkable for its extreme 
prominence. ‘The species appears to have been found only at considerable elevations. 
| 12. Cercyon striatus. 
Minutus, breviter ovalis, sat convexus, nitidus, testaceus, capite thoraceque crebre subtiliter punctatis ; elytris 
striatis, striis apicem versus profundioribus, interstitiis crebre subtilissime punctatis. 
Long. 2, lat. 2 lin. 
Hab Panama, Volcan de Chiriqui 2500 to 4000 feet (Champion). 
Head and thorax closely and finely punctate. Elytra with fine but very distinct 
strie, which become deeper behind; the striz and the interstices are very finely 
punctate. The prosternal carina is only very slightly elevated; the metasternal 
lamina is excessively slender; the metasternal pentagon is obsoletely punctate, and its 
two posterior sides are continued forwards as very distinct lines towards the outsides 
of the middle coxe. 
I have seen only a single and quite immature individual; but it evidently represents 
