42 [February, 



The perfect insect lives on bushes over the surface of running water, and is 

 also found creeping over the wet stones in torrents ; the under surface of the 

 body is sericeous, with fine fulvous hair, perfectly like Helichus. 



I.E. Lecontei, subdepressu?, ater, subtiliter punctulatus et pubescens, 

 thorace antice fortiter angustato, basi bisinuato, angulis posticis acutis, elytris 

 marginatis, lineis elevatis minus distinctis, pedibus rufis. Long. -2. 



Western New York and Pennsylvania. The great facilities and assistance 

 which my father, Major Le Conte, has constantly extended to me in my scientific 

 labors, will be a sufficient excuse for my continuing the name under which this 

 curious insect is mentioned by Dejean, and by which it is already known to a 

 large number of European entomologists. 



Div. 2. Dryopini Er. 

 Coxae anticae transversae, trochantino conspicuo, abdomen 5-articuIatum. 



Lara. 



Caput porrectum, subtus non obtectum; antennae simplices elongatae. 



Body elongate, narrowed and subacute anteriorly. Head not deflexed ; anten- 

 nae with the first joint cylindrical, a little longer and thicker than the two follow- 

 ing, which are equal ; the fourth is a little shorter; the rest are broken off, (pro- 

 bably serrate. The labrum is large and broad, rounded in front, and scarcely 

 emarginate ; the mandibles slightly emarginate at tip. Mentum trapezoidal, 

 ligula broad, truncate in front. Prosternum with a short point behind, which 

 fits into the excavated mesosternum; middle coxae moderately distant; posterior 

 coxae contiguous at base, very slightly and gradually dilated internally. Legs as 

 in Helichus. The body above and beneath coated with very fine pubescence. 



This genus seems to be the desired link connecting the anomalous form Eury- 

 palpus with the true Parnidae ; the abdomen, coxae and feet are precisely the 

 same as in the latter, while the long simple antennae are anomalous in this sub- 

 division ; the large uncovered labrum is not seen in this subdivision, but is found 

 in Elmis, Macronychus, &c., of the next subdivision, to which, however, it 

 cannot be referred on account of the transverse form of the anterior coxae. The 

 thorax is much narrowed in front, with the posterior angles acute; scutellum 

 large, acute; elytra almost parallel, rounded at apex. The genus is named after 

 a water nymph. 



1. L. a vara, olivaceo-picea, thorace confertim grosse punctato, lateribus bi- 

 sinuatis, disco elevato, canaliculate, margine antico late depresso, elytris nitidis 

 subtiliter striate punctatis, pone basin oblique impressis. Long. '3. 



Sacramento, California, Mr. Rathvon. The thorax has the disc suddenly ele- 

 vated and canaliculate, so as to present two large bosses, the lateral margin is a 

 little excavated anteriorly and posteriorly; the alternate interstitial spaces of 

 the elytra are more distinctly sericeous ; the feet are black, the femora at base 

 ferruginous. 



LuTRocHus Er. (Ins. Deutschl. 509.) 



1. L. lute us, ovalis, convexus, aeneo-luteus, subtiliter punctulatus, et bre- 

 vissime dense pubescens ; thorace lateribus rectis, basi bisinuata, medio leviter 

 producta, et truncata. Long. 12. This very remarkable insect was found by 

 Lieut. H. Haldeman, U. S. A., at Fort Gates in Texas ; for my specimens I am 

 indebted to his brother S. S. Haldeman. The only other species known is from 

 Brazil. 



Pelonomus Er. 



1. P. obscurus, subcylindricus, piceus, pube erecta dense vestitus, thorace 

 confertim punctulato, lateribus rectis obliquis, basi bisinuata, medio late trunca- 

 ta, angulis posticis acutis, elytris dense subtiliter punctatis, obsolete striatis, 

 tibiis tarsisque rufis. Long. '26. 



Southern and Western States, very rare ; remarkable for the eyes being nearly 

 as hairy as the rest of the body. 



