VOL. 65. 



Ig PROCEEDINGS OF THE NATIONAL MUSEUM. 



scarcely visible when viewed from below. Mandible apically chitin- 

 ized, proximally with two short soft hairs, basally with a soft hair 

 near each articulation. Pronotum convex, wider than long, sub- 

 rectangular, anterior margin feebly and broadly emarginate, frontal 

 an-le rounded, side margins arcuate, posterior corners more angular, 

 posterior margin broadly emarginate; all but part of posterior por- 

 tion, covered with fine, short setae. Mesonotum slightly convex 

 transverse, sparsely haired; elytral pads passing obliquely backward 

 between tibia and tarsus of mesothoracic and metathoracic legs, api- 

 cal fourth visible from beneath; scutellum trapezoidal, widest an- 

 teriorly. Metanotum, a little longer than mesonotum, slightly sinu- 

 ate behind ; setae arranged as on mesonotum. .,11,, 

 Legs somewhat prominent laterally, not appressed against body, 

 distinctly compressed, not very broad; tarsi separated from each 

 other in median line, except the metatarsi which are m contact from 

 base of metatarsus to claw; coxae and sterna visible in the median 



'^Abdominal segments convex ventrally, less so dorsally; first six 

 terga transversely rectangular; seventh and eighth arcuate pos- 

 teriorly; each tergum bearing two transverse rows ot weak setae; 

 lateral portion of terga of first seven abdominal segments produced 

 into subrectangular, platelike processes.^« 



Lateral process of first abdominal tergum anteriorly (fig. IJ) 

 drawn out into a spur directed outward with tip chitinized, bearing 

 at base a long, thin seta; medianly (m) deeply emarginate; posteri- 

 orly (V) forming bifid spur directed laterally and with tip chitmized, 

 base of anterior tooth (t) bearing seta; second to sixth lateral proc- 

 esses inclusive (figs. 24, 25), usually alike- having anterior spur 

 (a) bifid, with one tooth (t) hooklike and directed inward and o her 

 tooth it) directed outward with seta at base, postei^or spur (usually) 

 bifid, directed posteriorly and with seta at base of tooth (t) ; seventh 

 process as sixth, except posterior spur (p, fig. 26) which is single 

 with seta at base and is constant; eighth tergum (fig. 29) with plate- 

 like processes reduced to two minute chitinous spines, one medianly 

 (m) and one posteriorly placed (p), each with a seta at base; nin h 

 tergum or pvgidium, subtrapezodial (figs. 28, 30) bearing apically 

 two long, conical cerci, chitinized at tips and each bearing at base, 

 on outer side, a short seta ; ninth tergum medianly with two fleshy 

 spinelike proiections, the apices of which are bifid and chitmized 

 anterior margin of tergum concave, lateral margins slightly arcuate. 



process of second .ibdominal segment, or the opposite (t, fig. -6) on anterior sp 

 seventh segment. 



