CYDNIDAE OF THE WESTERN HEMISPHERE — FROESCHNER 401 



Key to the species of Microporus 



1. Pronotum laterally with six to seven and costa with four setigerous punctures; 



color yellow with dorsal punctures and maculae fuscous to black. 



nigropunctatus (Berg) (p. 401) 



Pronotum laterally and costa with numerous (20 or more on each) setigerous 



punctures; color piceous to black 2 



2. Osteolar peritreme terminating in a large loop- or ear-shaped process (fig. 



90,a) obliquus Uhler (p. 402) 



Terminal loop of osteolar peritreme smaller (figs. 90,b-d). 



testudinatus Uhler (p. 405) 



Microporus nigropunctatus (Berg), new combination 



Cyrtomenus nigropunciaius Berg, 1879, p. 12. 



Cydnus nigropunctatus Signoret, 1882, p. 145, pi. 6, fig. 64. — Lethierry and Severin, 

 1893, p. 67. 



Diagnosis. — ^Tlie wholly yellow color with fuscous punctures and 

 maculae is unique within the family. 



Description. — Based on a single specimen. Female : Oval, widest 

 behind middle. 



Head: Wider than long, 1.28:1.02; interocular width 0.40; free 

 margin semicircular. Antennal segments: I, 0.26; II, 0.30; III, 0.28; 

 IV, 0.32; V, 0.34. Surface shining, with numerous close-set coarse 

 rugae radiating from base of clypeus, numerous finer, irregular, trans- 

 verse rugae between ocelli. Labial segments: I, 0.48; II, 0.62; III, 

 0.48; IV, 0.40. 



Pronotum: Length almost half of width, 1.24:2.64; surface, except 

 on and between calli, with numerous distinct punctures crowded into 

 short, irregular, transverse rows on disc and becoming finer laterall}^ ; 

 transverse impression obsolete; side margins with six or seven seti- 

 gerous punctures, onl}^ two of these posterior to transverse impression. 



Scutellum: As long as broad, 1.60: 1.60; surface, except basal angles, 

 with minute, longitudinal rugae between the irregularly scattered dis- 

 tinct punctures, latter absent basall}'-. 



Hemelytron: Corial areas w^ell-defined; irregularly alutaceous; exo- 

 corium less distinctly punctured than mesocorium, latter with single 

 row of punctures paralleling claval suture; clavus alutaceous with two 

 longitudinal rows of punctures; costa with four setigerous punctures; 

 membranal suture nearly straight, lateral angle rectangular; membrane 

 longer than basal width. 



Propleuron: Weakly alutaceous, virtually impunctate; prosternal 

 carinae moderately thick, low. 



Mesopleuron: Evaporatorium forming narrow band around peri- 

 treme and becoming evanescent apically; lateral area polished to 

 weakly alutaceous. 



501991—60- 



