124 CORYLOPHID. 
broader than the head and thorax, and more deeply punctured, widest near the middle, the apex rounded 
and rather paler. Legs moderate, pitchy-black, with the anterior tibie long and incurved. 
Hab. GUATEMALA, near the city (Champion). One specimen. 
Differs from the preceding species in its much smaller size, more rounded and less 
convex form, dark legs and antenne, and black colour. 
3. Orthoperus ovatus, sp. n. 
Ovatus, validissime convexus, fere glaber, rufo-castaneus; pronoto sat longo, indistincte punctato, ad basin 
latissimo, margine basali leviter sinuata, angulis fere rectis; elytris quam caput atque pronotum parum 
latioribus et sesqui-longioribus, ante media latissimis, postice leviter attenuatis, apice sat acuto, dilutiore ; 
pedibus atque antennis pallide ferrugineis. Long. corp. 75; lin.=0-63 millim. 
Head much exserted; eyes large; antenne yellow, with the club dusky. Zhoraw rather long, indistinctly 
punctured, widest at the base; basal margin slightly sinuated, with the angles nearly rectangular. 
Scutellum very small, triangular. lytra rather broader and half as long again as the head and thorax, 
widest before the middle, slightly attenuated posteriorly, the apex rather acute and paler. Legs moderate, 
pale ferruginous. Underparts piceous, with the venter paler. 
Hab. GUATEMALA, San Gerdénimo (Champion). One specimen. ° 
Differs from all others of the genus in its very convex and narrow ovate form and 
rufo-castaneous colour. 
4, Orthoperus perpusillus, sp. n. 
Late ovalis, nigro-piceus, nitidissimus, fere impunctatus; capite parvo; oculis modicis, haud prominentibus ; 
pronoto magno, ad basin latissimo, quam levissime alutaceo, lateribus marginatis, margine basali scutellum 
versus producta; elytris quam pronotum vix latioribus, duplo longioribus, ante media latissimis, quam 
levissime alutaceis, punctis minutissimis, remotis, striatim dispositis, impressis, lateribus marginatis, 
apicibus latis, valde rotundatis; pedibus longis, nigro-piceis, tarsis elongatis; antennis sat robustis, totis 
flavescentibus. Long. corp. 74 lin.=0°50 millim. 
Body broadly oval, pitchy-black, very shining, almost impunctate. Head small; eyes moderate, not prominent. 
Thorax large, widest at the base, very minutely alutaceous ; sides margined; base produced towards the 
scutellum. Scutellum very small, triangular. Llytra scarcely broader but twice longer than the thorax, 
widest before the middle, very minutely alutaceous, marked with very minute remote punctures in longi- 
tudinal striz ; sides margined ; extremities very broad, and much rounded. Legs long, pitchy-black ; tarsi 
very long. Antenne rather robust, entirely dusky yellow. Underparts pitchy-black. 
Hab. Mexico, Teapa (Sallé). One specimen. 
This, the most minute of all the known species of Orthoperus, may be recognized by 
its exceedingly small size, broadly oval form, and pitchy-black legs. 
RHYPOBIUS. 
Rypobius, Leconte, Proc. Acad. Phil. vi. p. 142 (1852). 
Rhypobius, Gemminger & Harold, Cat. xii. p. 3818. 
Body ovate, exceedingly convex. Head rather large, covered, but not concealed, by the thorax, the parts of the 
mouth very prominent; eyes large and very prominent; antenne inserted considerably in front of the eyes. 
Thorax large, its front margin entire, the extreme front sometimes straight, the hinder angles not produced. 
Scutellum rather large, rounded at the apex. lytra entire, semiovate. Wings wanting. Abdomen 
