CYDNIDAE OF THE WESTERN HEMISPHERE — FROESCHNER 483 



Entomologisches Institut, also in East Berlin, did not locate the 

 specimen. 



Within the subgenus, xanthopus, pluripunctatus , semibrunneus , and 

 subtilius stand out on the basis of the modification of the spines of 

 the posterior tibiae and the convex, more or less rugose head surface. 

 Both of these characters appear in the genus Cyrtomenus, which these 

 four species superficially resemble quite closely due to their more 

 convex dorsum. Other students may prefer to transfer these four 

 species to Cyrtomenus, a step which could be easily accomplished by 

 rearranging the key to genera so that the character of the spines of 

 the hind tibiae comes before that of the subapical impression of the 

 pronotum. The present author, however, prefers to consider the 

 subapical impression of the pronotum a better phylogenetic indicator 

 and to leave these forms as they have been treated for many years. 

 The conclusion to keep these forms in Pangaeus is admittedly con- 

 servative and currently tentative until investigations of the internal 

 genitalia of the females are made. 



Pangaeus (Pangaeus) bisetosus, new species 



Plate figure 225 



Diagnosis.— The presence of two submarginal setigerous punctures 

 on a jugum (one next to eye, one at apical third) will separate this 

 species from all others in the subgenus. 



Description. — Based on one male. Male: Oval, widest near 

 midlength. 



Head: Length more than four-fifths width, 1.19:1.30; interocular 

 width, 0.75; anterior outline a full semicircle, clypeus as long as juga, 

 strongly narrowed apically; surface shining, impunctate; jugum with 

 two submargmal setigerous punctures, one immediately anterior to 

 eye and one at apical third; ocelli moderate, separated from eye by 

 space equal to twice transverse ocellar width; jugum ventrally and 

 maxillary plate, except basal margin, polished, impunctate. Anten- 

 nal segments: I, 0.23; II, 0.26; III, 0.33; IV, 0.38; V, 0.50. Bucculae 

 about half as high as labial II; labium reachmg between middle 

 coxae. Labial segments: I, 0.46; II, 0.72; III, 0.63; IV, 0.34. 



Pronotum: Length more than half width, 1.42 : 2.60; anterior margin 

 shallowly emarginate; lateral margin curved from near base, with 

 five setigerous punctures submarginally ; transverse impression post- 

 median, impressed for full width, marked by row of punctures; 

 anterior lobe unpunctate except for not more than five punctures 

 laterally; posterior lobe with 12 to 15 punctures medially. 



Scutellum: Length less than width, 1.49:1.62; disc shining, with 

 not more than five large punctures. 



