NATURAL SCIENCES OF PHILADELPHIA. 383 



This species resembles in form S. s pi e n d e n s, and, like it, presents 

 no great sexual differences. It differs from that, as from all other 

 species of the genus known to me, by the mandibles being broadly 

 truncate at tip, with the outer angle rounded. I may remark, in passing, 

 that the ^ of S. splendens resembles very much the 9 of S. J u 1 i a n u s, 

 but may be easily distinguished by the form of the clypeus, which in the 

 latter is more acute and subtruncate at tip, while in the former it is less 

 acute, and more rounded. The excavation of the prothorax likewise retains 

 iu the $ of S. Julianus a subtriangular form, while in S. splendens 

 it is quite circular. 



PHILEURUS Latr. 



P. ill at us Lee. On renewed examination of the fragments upon which 

 I established this species, with specimens of P. v i t u 1 u s Lee, N. Sp. p. SO. 

 from Cape San Lucas, I am convinced that they are identical ; the latter 

 name should therefore be suppressed. The species is common to the region 

 of the Colorado Desert, and Lower California, and is another example of the 

 propriety of including the latter province within the zoological, as it will 

 eventually be within the political, boundaries of the United States. 



ANCYLOCHIRA Esch. 



In my revision of the Buprestida? of the United States, I have divided the 

 species of this genus into two groups. The first contains those in which the 

 anterior tibise are emarginate internally in the male, and hooked at the ex- 

 tremity ; the last three dorsal segments of both sexes are rounded ; the fifth 

 ventral segment varies in form, according to sex ; the thorax is sometimes 

 subcarinate, but never channeled. The second contains the species having 

 the tibife alike in both sexes ; the antepenultimate dorsal segment is trun- ' 

 cate or emarginate ; and the fifth ventral is alike in both sexes, broadly trun- 

 cate, with the angles slightly prolonged ; the thorax is always feebly chan- 

 nelled. A. sexplagiata, Langii and fasciata, which, in the List, 

 are placed in the first division, should be transferred to the second. 



ACMiEODERA Esch. 



A. amplicollis, robusta cuneiformis, senea, vel cyaneo-senea, punc- 

 tata, supra pube longa erecta villosa, subtus laxe ciiiereo-pubescens, thorace 

 lougitudine triplo latiore, lateribus valde obliquis parum rotundatis, fortiter 

 inarginatis, ad basin elytris latiore, fortiter punctato, medio canaliculato et tri- 

 angulariter excavato, ad basin utrinque excavato, vitta lata submarginali a 

 basi fere ad apicem extensa, flava: elytris nigris, vitta dorsali abbreviata, cum 

 altera matginali postice counexa, fasciisque posticis plus minusve connexis 

 flavis ; striis grosse punctatis, interstitiis angustis convexis uniseriatim 

 punctulatis. Long. 1012 mm. 



Fort Whipple, Arizona, Dr. Cones. At first sight this species resembles 

 the Texan A. semivittata Lee, but it differs very much in the form of 

 the thorax, by the elytra being narrowed behind from the base, and by the 

 striae being formed of very coarse punctures. It resembles, in the form of the 

 thorax, A. flavomarginata and opacula, but is more robust than 

 those species ; as in them the last ventral segment has an acute submarginal 

 crest around the tip. 



A. decipiens, subcuneiformis, nigro-senea, punctata, pilis longis nigris 

 erectis villosa, subtus laxe cinereo-pubescens, thorace longitndine triplo latiore, 

 prope basin elytris latiore, lateribus rotundatis acute marginatis, vitta sub- 

 marginali antice abbreviata flava ornato, grosse punctato, medio canaliculato, 

 et triangulariter vage excavato, utrinque oblique excavato ; elytris a basi sub- 

 augustatis, versus apicem sensim rotundatim attenuatis, nigro-ameis fasciis 

 transversis varie connexis variegatis, striis antice punctatis haul impressis, 



1866.] 



