370 [June, 



One specimen found at Eagle Harbor, Lake Superior. Narrower than H. fim- 

 briatus, with a broader and less defined yellow margin, and without any series 

 of larger points on the elytra. 



b. 



4. P. m acul i c o 1 1 i s, ovalis modice convexus, nigro-piceus nitidus, capite 

 thoraceque subtiliter punctatis, lateribus indeterminate piceis, epistomate late 

 emarginato; elytris striis 10 profundis punctatis, interstitiis parum convexis, 5to 

 ad striam 5tam punctorum maiorum serie notato, palpis rufis. Long. -24. 



Variat corpore supra testaceo thoracis disco nigro, fsmoiibus piceis, tibiis tar- 

 sisque testaceis. 



Jrlelochares macvlicollis Mulsant, Ann. Sc. Phys. Nat. Lyon, 7, 379. 



Illinois Mr. Willcox ; Louisiana, Mr. Salle. The prosternum is distinctly 

 though not strongly carinate : the mesosternum is very faintly elevated in the 

 middle. The 10th stria of the elytra is distant from the margin, but the interval 

 is very faintly longitudinally impressed : the margin is narrow and reflexed. 



The variety in general appearance resembles Phaleria testacea Say. 



5. P. n e b u 1 o s u s, ellipticus convexus, subtiliter saepe fere obsolete punctu- 

 latus, supra testaceus nitidus, capite nigro, macula magna antica utrinque 

 pallida, elytris seriebus 4 punctorum solitis notatis, stria suturali tenui antice 

 evanescente, tenuiter plus minusve fusco lineatis ; subtus niger, pedibus piceo- 

 testaceis femoribus eaepe fuscis. Long. -14 -16. 



Hydrophilus n-bulosus Say, Long's Exped. 2, 277. 



New York, Georgia, Lake Superior, Nebraska. The crest of the prosternum, 

 as in the next two species of this division is acute, and gradually more elevated 

 towards the tip. Tbis species bears a strong resemblance to P. ochraceus, but 

 the punctures are finer and less deep ; the prosternal carina will however at once 

 distinguish it. 



6. P. p e c t o r a 1 i s, ellipticus convexus, subtiliter punctulatus, supra testaceus 

 nitidus, capite nigro-piceo, antice "testaceo linea frontali media fusca, elytris 

 seriebus 4 punctorum solitis, stria suturali antice abbreviata, subtus niger, tibiis 

 tarsisque testaceis, femoribus fuscis. Long. -11. 



Co'orado River, California: smaller than the preceding, and principally dis- 

 tinguished by the whole of the front being pale, with only a narrow fuscous line 

 in the middle. 



7. P. cristatus, ellipticus. longior convexus subtiliter punctulatus, supra 

 piceus nitidus, capite nigro-piceo, clypei lateribus anguste testaceis, thoracis 

 lateribus obliquis vix rotundatis et apice indeterminate sed anguste testaceis, 

 elytris seriebus 4 solitis punctorum notatis, stria suturali antice abbreviata, 

 lateribus et apice indetermiuate testaceis, subtus niger, palpis tibiis tarsisque 

 testaceis. Long. -13. 



One specimen from San Diego, California: besides the diffsrence in the color 

 of the head, this species is narrower than either of the two preceding, and the 

 sides of the thorax are less rounded. 



8. P. c a r i n a t u s, ellipticus convexus piceo-niger nitidus, confertim subtiliter 

 punctulatus, elytris seriebus 4 puuctorum solitis distinctis, stria suturali antice 

 abbreviata, ad apicein picescentibus, tarsis palpisque rufo-piceis : prosterno sub- 

 acqualiter modice carinato. Long. -2. 



San Francisco and San Jose, California. This species has nearly the appear- 

 ance of P. diffusus of the next division, but besides the differences in the 

 sternum the sides of the elytra are uniformly declivous, with a very narrow re- 

 flexed margin, while in all the species of division d. they are slightly concave 

 with a wider reflexed margin. In one specimen may be seen traces of very in- 

 distinct striae on the posterior part of the elytra, but in the others no such are 

 visible. 



