, 68 
PROCEEDINGS OF THE ACADEMY OF 
C. basalis, longiusciila depressa, senea, capite virescente, densissime ru- 
gose piinctato, thorace snbtilius dense punctato, parcins autem in disco, linea 
dorsali indistincta snblsevi, latitudine breviore, lateribns obliquis antice oblique 
truncatis, callo angusto basali utrinque notato, elytris subtilius punctatis, 
costa 3ia postice abbreviata, fovea profunda basali stigmatibusque tribus sicut 
in priore positis subauratis, subtus senea punctata. Long. -7. 
Laredo to Ringgold Barracks, Mr. Schott. Resembles the preceding, but is 
longer and less densely punctured. The impressed spots of the elytra are 
similar, but less brightly colored. The sexual characters are quite distinct ; 
the anterior and middle tarsi of the male are thicker, much curved and armed 
with several distinct teeth internally ; on the anterior tibiae these teeth are 
placed from the middle to the tip, but on the middle tibiae they are all within 
the limits of the middle third. The female has the same sexual characters as 
in C. o c 1 0 c o 1 a. 
C. exes a, latiuscula, senea, capite dense punctato, multicalloso, thorace 
latitudine breviore, lateribus obliquis antice oblique truncatis, insequali valde 
punctato, partibus elevatis fere Isevibus nigricantibus ; elytris postice fortius 
serratis, dense minus subtiliter punctatis, costa Ima Integra, reliquis inter- 
ruptis, partibus elevatis Isevibus nigricantibus, stigmatibus duabus magnis 
transversis trilobatis subauratis. Long. -36 — -42. 
A female found by me on the Colorado, and another by Mr. Schott in Sonora. 
Evidently related toC. scabripennis Lap. (Biip. trinervia Kirby) ; it is 
however much more uneven and more strongly punctured. The complete 
breaking up of the second and third of the elevated lines of the elytra does not 
take place in any other species known to me ; the punctures beneath are large ; 
the fifth ventral segment has a smooth medial space, but is not carinate ; th« 
lateral tooth is very distinct. 
POLYCESTA Esch. 
P. elata, nigro-senea, fronte concava, thorace insequaliter punctato, callo 
utrinque ad apicem Isevi notato, medio late sulcato, in medio ipso tenuiter 
carinato, et postice subtiliter canaliculate, utrinque ad basin late excavate,* 
antrorsum valde angustato, lateribus pone medium angulatis, elytris postice 
oblique angustatis, seriatim clathratis, dense punctatis, interstitiis alternis 
elevatis, sutura antice, 3ia et 5ta valde elevatis Isevibus. Long. '93. 
One specimen, Texas, Mr. Haldeman. Resembles P. californica Lec. 
Pac. R. R. Expl. vol. 9 (insects), 45, but is larger: the posterior angles of the 
thorax are less obtuse, and the medial excavation is carinated ; the suture of 
the elytra is elevated towards the base. 
There are now known to me five species of Polycesta found within the limits 
of the United States : they may be thus distinguished. 
A. Prothorax with three large excavations ; elytra strongly costate. 
^ Front deeply concave. 
1. Elytra moderately clathrate ; interstices (except the smooth costse) 
densely punctured, P. elata Lec. 
2. Elytra coarsely clathrate ; interstices (except the smooth costse) sparsely 
punctured, P. c a v a t a Lec. 
* ^ Front slightly concave. 
3. Elytra moderately clathrate ; interstices (except the smooth costse) 
densely punctured, P. californica Lec. 
B. Thorax excavated only at the middle. 
4. Medial excavation distinct ; elytra variolate in rows, 3rd interstice wider 
and more elevated towards the base ; obtusely rounded behind, 
P. o b t u s a Lec. 
5. Medial excavation weak ; elytra coarsely punctate-striate ; interstices 
sparsely punctured, alternately a little more elevated, 
P. V e 1 a s c 0 Lap. 
[March 
