4g [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. 
1.E. Lecontei, subdepressus, 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. Dryopint Er. 
Coxe antice transverse, trochantino conspicuo, abdomen 5-articulatum. 
Lara. 
Caput porrectum, subtus non obtectum; antenne& simplices elongate. 
Body elongate, narrowed and subacute anteriorly. Head not deflexed; anten- 
nz 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 coxe moderately distant; posterior 
cox 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 Jink connecting the anomalous form Eury- 
palpus with the true Parnide; the abdomen, coxe and feet are precisely the 
same as in the latter, while the long simple antenn& 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 theanterior coxe. 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.avara, olivaceo-picea, thorace confertim grosse punctato, lateribus bi- 
sinuatis, disco elevato, canaliculato, margine antico late depresso, elytris nitidis 
subtiliter striato punctatis, pone basin oblique impressis. Long. °3. 
Sacramento, California, Mr. Rathvon. The thorax has the dise 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. 
Lutrocuus Er. (Ins. Deutschl. 509.) 
1. L. luteus, ovalis, convexus, eneo-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 8.8. Haldeman. The only other species known is from 
Brazil. 
PexLonomus Er. 
1. P.obseurus, 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. 
