REVISION OF THE BUPRESTIDyE OF TIIE UNITED STATES. 
219 
B. Unguiculi appendiculati. 
Parapleurm obtectm (scutellum distinctum.) - - . . . Ptosima 
Parapleurae detects (scutellum uullum.) - Acmmodera. 
Thrincopyge Lee. 
Antennae distantes, in foveis minutis insert®, articulo lmo longiore sed hand crassiore, 2-4 obconicis, 5-6 
triangularibus, 7—11 subtrapezoideis: fossulis poriferis infernis, iuconspicuis. Labrum transversum; epistoma 
late emarginatura. Mandibuloc truncat®, valde obtusae. Palpi breves filiformes. Mcnturn breve, corneum, trape- 
zoideum. Scutellum parvum triangulare. Prosternum latum lateribus baud angulatis, apice valde obtusum; 
mesosternum emarginatura, haud divisum, metasterno arete conuatum, sutura tameu distincta. Pedes breves, tarsi 
valde dilatati subtus lobati, articulo ultimo piano, unguiculis distantibus integris, lmo posticorum paulo longiore. 
Abdomen sexus utriusque articulo 5to postice sulco profunde circumducto. 
A curious genus containing New Mexican species. The body is flat above, narrow and 
subparallel, the thorax narrower at the base, rounded on the sides, base bisinuate and 
margined. Elytra with acute humeral angles, parallel on the sides, then narrowed* to the 
apex which is truncate and finely serrate. Anal plate in male formed of two segments, 
the last slightly emarginate; in the female flat and broadly rounded. 
1. '1. a 1 a c r i s, lmte vmdi vel cyanco-®nea, nitida, capite grosse thorace parcius punctato, lateribus flavo mar- 
ginatis, elytris punctato-striatis, interstitiis parce punctulatis, maculis utrinque tribus plus minusve deficientibus, 
apice truncato subtiliter serrato. Long. -05 —8. Tab. XII., fig. 2. 
Lee. Journ. Acad. Nat. Sc. 2nd ser. 4, 17. 
Arizona and New Mexico. Varies in the size of the spots of the elytra, which become 
smaller, interrupted, and finally disappear entirely. The lateral yellow margin of the 
thorax also disappears, leaving only a spot behind the middle. In one specimen the an¬ 
terior margin is also yellow and interrupted into spots. A yellow spot on the posterior 
coxae is usually seen, but fails in many specimens; so, too, with a yellow dot at the ante¬ 
rior extremities of the anal sulcus. 
2. T. ambiens, viridi-amea, capite dense punctato, fronte rugosa, thorace punctato, margine laterali flavo, 
elytris striatis, strns punctatis, interstitiis uniseriatim puuctatis, margine laterali flavo, pone humeros et ad medium 
paulo latiore. Long. -68. 
Buprestis ambiens Lee. Proc. Acad. 7, 83. 
One specimen, Frontera, Rio Grande, Mr. Clarke. Of a brighter green than the pre¬ 
ceding, though much less shining. 
Chrtsopiiana Lee. 
Antennm distantes, in foveis parvis iusert®, tenues, articulo lmo obeonico, et 2ndo paulo crassioribus, hoc duplo 
breviore, 3io angusto lmo aequali, 4—10 triangularibus, parce pilosis, sensim vix brevioribus, ultimo ovali, (fos¬ 
sulis poriferis haud obviis.) Labrum integrum, epistoma late emarginatum. Mandibul® subacut®; palpi fili- 
VOL. XI.— 29 
