566 PROCEEDINGS OF THE NATIONAL MUSEUM vol. in 



Tominotus signoreti (Mulsant and Key), new combination 



Plate figures 6, 35, 80, 111, 117, 140, 256 



Cydnus (Tominotus) signoreti Mulsant and Rey, 1866, p. 319. 

 Cyrtomenus constr ictus Berg, 1879, p. 277. 



Aeihus {Tominotus) constrictus Signoret, 1881b, p. 427, pi. 12, fig. 56. 

 Cydnus signoreti Lethierry and Severin, 1893, p. 68. 



Diagnosis. — The broad scutellar apex, the single, lateral sub- 

 marginal row of setigerous punctures and the unicolorous corium and 

 legs combine to separate this species from others within the genus. 

 The pronotal constriction shown by the males is the deepest and most 

 abrupt found in any cydnid of the Western Hemisphere. 



Description: Based on a single male and a single female. Male: 

 Rounded oval. 



Head : Length about two-thirds width, 1 .00 : 1 .46 ; interocular width, 

 1.06; outline semicircular, eyes projecting by about one-third their 

 width; juga shining, with faint radiating rugae; surface, including 

 base of clypeus, faintly alutaceous, with scattered minute punctures; 

 clypeus with two subapical setigerous punctures; juga with sub- 

 marginal row of setigerous punctures bearing only long cilia, no pegs ; 

 juga ventrally and maxillary plate polished, impunctate. Antennal 

 segments: I, 0.23; II, 0.25; III, 0.30; IV, 0.33; V, 0.33. Bucculae 

 low, evanescent posteriorly (fig. 35) ; labium reaching between middle 

 coxae (as in female?). Labial segments: I, 0.56; II-IV missing. 



Pronotum: Width more than twice length, 3.32:1,56; anterior 

 margin deeply bimarginate; side margins very deeply and abruptly 

 constricted opposite ends of transverse groove (fig. 6), with single, 

 submarginal row of 25 to 27 setigerous punctures, one setigerous 

 puncture near base set mesad of this row; transverse groove absent; 

 anterior lobe laterally with broad area of prominent punctures; 

 posterior lobe, except hind margin, punctured across width. 



Scutellum: Distinctly wider than long, 2.28:1.75; triangular, apex 

 not narrowed (fig. 80) ; impunctate basally, discally with numerous, 

 close-set, moderate punctures becoming finer posteriori}'". 



Hemelytron: Corial areas well defined, alutaceous and rather 

 uniformly punctured on discal and exocorial areas with two rows of 

 closer set punctures paralleling claval suture; clavus finely alutaceous, 

 with irregular rows of fine punctures; costa with 13 to 15 punctures; 

 membranal suture bisinuate; membrane longer than basal width, 

 somewhat surpassing apex of abdomen. 



Propleuron: Impunctate; prosternal carinae prominent, thick, 

 calloused, abruptly and rectangularly terminated ventrally. 



Mesopleuron (fig. Ill): Evaporatorium interrupted b}^ a broad 

 polished band along posterior margin. 



