CYDNIDAE OF THE WESTERN HEMISPHERE — FROESCHNER 451 



Discussion. — The few ecological comments on specimens examined 

 were the usual "at lights," implying that these insects are active 

 after dusk. 



None of the specimens studied showed the tubercles described and 

 figured with the original description. In fact, in his later "Revision," 

 Signoret himself did not again mention such a modification. 



The synonymizing of minusculus Jensen-Haarup with this species 

 is based on comparison of undoubted specimens of the latter with the 

 type of minusculus. This comparison was made by Dr. S. L. Tuxen. 



Melanaethus subpunctatus (Blatchley), new combination 



Plate figure 217 

 Geotonms subpunctatus Blatchley, 1926, p. 78.— Torre Bueno, 1939, p. 181. 



Diagnosis.— The virtual absence of large punctures from the 

 transverse impression and posterior lobe of the pronotum coupled 

 with the broadly reflexed costa will separate this species from all 

 others in the genus. 



Description. — Male: Broadly oval, widest at midlength. 



Head: Length more than half width, 0.66(0.62-0.67) : 1.00(0.99- 

 1.03); interocular width, 0.65(0.63-0.69); anterior outline semicircu- 

 lar, often flattened, clypeus as long as juga, not much narrowed 

 apically; surface shining, with numerous crowded punctures; with 

 marginal carina dorsally; ocelli small, separated from eye by space 

 nearly twice transverse ocellar width; jugum ventrally and maxillary 

 plate (except basally) shining, impunctate. Antennal segments: 

 I, 0.18(0.16-0.20); II, 0.20(0.17-0.23); III, 0.20(0.20-0.21); IV, 

 0.23(0.23-0.26); V, 0.30(0.30-0.34). Bucculae higher than labial II, 

 abruptly terminated posteriorly; labium reaching between middle 

 coxae. Labial segments: I, 0.26(0.25-0.30); II, 0.53(0.50-0.58); III, 

 0.40(0.37-0.44); IV, 0.28(0.25-0.33). 



Pronotum: Length about half width, 1.09(1.04-1.17) :2. 12(2.02- 

 2.22); Anterior margin deeply, doubly emarginate; lateral margin 

 straight on basal half or two-thirds, with one submarginal setigerous 

 puncture at apical angle or none; transverse impression obsolete to 

 absent, not marked by special row of punctures; anterior lobe with 

 numerous crowded, coarse punctures laterally, and in a band parallel- 

 ing anterior margin, calli with scattered minute punctures; posterior 

 lobe with widely scattered minute punctures medially, closer coarser 

 ones laterally. 



Scutellum: Length equal to or longer than width, 1.35(1.24- 

 1.43): 1.27(1.24-1.32); shining, with numerous minute punctures and 

 very few coarse ones, both becoming more numerous towards apex. 



Hemelytron: Basal width across both hemelytra usually slightly 

 vndev than pronotum; clavus with one row of punctm-es; mesocorium 



