598 PROCEEDINGS OF THE NATIONAL MUSEUM vol. in 



Dallasiellus {Dallasiellus) alutaceus, new species 



Plate figure 270 



Diagnosis. — Among the moderately large species (5.5-6.5) with the 

 three widely separated setigerous punctures on the submargin of the 

 head, this one may be recognized by the short labium, which does not 

 surpass the middle coxae, and by the distinct alutaceous sculpturing of 

 the corium. 



Description. — Male: Oval, slightly elongate. 



Head: Length about three-fifths width 0.99(0.95-1.06) : 1.59 (1.44- 

 1.69); interocular width, 0.87(0.83-0.93); anterior outline less than 

 a full semicircle, clypeus as long as juga and strongly narrowed apically ; 

 surface weakly alutaceous, with scattered fine punctures; jugum with 

 obsolete radiating rugae, wdth three widely separated setigerous 

 punctures submarginally ; ocelli large, separated from eye by slightly 

 more than transverse ocellar width; jugum ventrally and maxillary 

 plate, except on basal fourth, polished and impunctate. Antennal 

 segments: I, 0.32(0.30-0.33) ; II, 0.37(0.34-0.43) ; III, 0.39(0.39-0.40) ; 

 IV, 0.55(0.52-0.60); V, 0.62(0.55-0.66). Bucculae about as high as 

 labial II, evanescent posteriorly ; labium reaching base of middle coxae. 

 Labial segments: I, 0.51(0.45-0.60); II, 0.85(0.75-0.94); III, 0.60 

 (0.58-0.63) ; IV, 0.50(0.46-0.54). 



Pronotum: Length slightly more than half width, 1.63(1.57-1.82): 

 3.16(2.93-3.43); anterior margin moderately emarginate; side margins 

 entire, straight on basal two-thirds, with five or six setigerous punctures 

 submarginally; transverse impression submedian, marked by regular 

 row of close-set punctures; anterior lobe with curved row of punctures 

 in subapical impression and numerous punctures laterally; posterior 

 lobe with distinct punctures most numerous medially. 



Scutellum: Longer than wide, 2.24(2.08-2.40) : 1.96(1.82-2.15); 

 shining, with numerous crowded punctures from near base almost to 

 apex, latter minutely punctate. 



Hemelytron: Clavus and corium strongly alutaceous; clavus with 

 one complete and one partial row of punctures; mesocorium with two 

 complete rows of punctures paralleling claval suture, discally with 

 distinct close punctures only at base and apex; exocorium with numer- 

 ous distinct punctures for full length; costa without or with one setiger- 

 ous puncture; membranal suture straight, lateral angle not prolonged; 

 membrane longer than basal width, surpassing apex of abdomen by 

 about one-fourth its length. 



Propleuron: Feebly alutaceous, distinctly punctate in depression 

 and anterior to acetabulum, minutely punctate on convexities; pro- 

 sternal carinae less than half as high as labial II. 



Mesopleuron: Evaporatorium entire; lateral area impunctate. 



