Coleopterous Fauna of Lower Rio Grande Valley. 67 
PARNIDAE. 
189. Throscinus , n. sp. — Two specimens taken running on muddy 
beach south of Point Isabel, June 29th. A very small black elongate 
beetle. Distr. Known only from the Lower Rio Grande region. 
HETEROCERIDAE. 
190. Heterocerus pallidus, Say.— One at light, June 22nd. Distr. 
Arizona, New Mexico and Kansas to Texas. 
191. Heterocerus schwarzii, Horn. — One at light, June 19th. Distr. 
Known only from a few widely separated localities. 
DASCYLLIDAE. 
192. Scirtes , n. sp. — One beaten in palmetto thicket at Santo Tomas, 
June 23rd. Like a large halticid, pale tawny yellowish with finely black- 
lined elytra, lines interrupted on hind third. Distr. Known only from 
the Lower Rio Grande region. 
ELATERIDAE. 
193. Atom gorgops, Lee. — Three taken on trunks of live and dead 
ash trees, at La Blanca and Granjeno, Texas, May 8th and 9th. Distr. 
Kansas to Texas and Mexico. 
194. Hemirhipus fascicularis , Fabr. — One at light, June 19th. 
Distr . District of Columbia to Missouri, Florida, and Texas. 
195. Horistonotus curiatus, Say. — Beaten from tangles of Clematis 
drummondii in openings of woods near Rock’s Resaca, June 25th. 
Distr. Virginia, North Carolina and Florida to Alabama, Louisiana, 
and Texas. 
196. Horistonotus , n. sp. — Several beaten from Clematis drum- 
mondii tangles in palmetto jungle at Santo Tomas, June 23rd. A 
small, brown species. Distr. Known only from the Lower Rio Grande 
region. 
197. Esthesopus , n. sp. — One beaten from foliage in palmetto thicket 
at Santo Tomas, June 9th. Distr. Known only from the Lower Rio 
Grande region. 
198. Anchastus bicarinatus, Lee.— One at light, June 10th. Distr. 
Florida to Louisiana, and Texas. 
199. Monocrepidius vespertinus , Fabr. — One beaten in palmetto 
thicket at Santo Tomas, June 9th, and one at light, June 22nd. Distr. 
New Jersey to Nebraska, Kansas, and Texas. 
200. Ischiodontus ferreus, Lee. — One female at light, June 10th, and 
