CYDNIDAE OF THE WESTERN HEMISPHERE — FROESCHNER 449 



Pittsburgh, Washington Co.; March, September. Texas: Concho Co., Victoria; 

 February, August. Virginia: Deer Run, Great Falls; June. 



Discussion. — The only ecological note on any specimen was "woods 

 ground cover" on a small series from Illinois. 



Melanaethus spinolae (Signorel), revived combination 



Plate figure 216 



Aethus spinolae Signoret, 1863, p. 545, pi. 12, fig. 12.— Walker, 1867, p. 152.— 

 Stai, 1876, p. 27 ("loc. incert."). 



Melanaethus spinolae Uhler, 1877, p. 392. 



Geoiomus (Cydnus) spinolai Signoret, 1883, p. 209, pi. 4, fig. 172. 



Geotonms spinolai Uhler, 1886, p. 3.— Lethierry and Severin, 1893, p. 74. — Bar- 

 ber and Bruner, 1932, p. 238. 



Geoiomus minusculus Jensen-Haarup, 1926, p. 50. New synonymy. 



Diagnosis. — The small size (2.7-3.2) and the thick, almost cal- 

 loused margin of the head, which has no dorsal carina and is unarmed 

 except for a single, submarginal setigerous puncture in front of 

 eye, mark this species as very distinct. 



Description. — Male: Elongate-oval, sides subparallel. 



Head: Length about two-thuds width, 0.52(0.50-0.54) : 0.74 (0.73- 

 0.76); interocular width, 0.44(0.43-0.46); anterior outline angled, side 

 margins convex, clypeus longer than juga; margin thick, almost cal- 

 loused, without dorsal carina, with one submarginal setigerous punc- 

 ture next to eye; surface, including cl3^peus, shining, with scattered 

 fine but distinct punctures; ocelli moderate, separated from eye by 

 space less than twice transverse ocellar width; jugum ventrally and 

 maxillary plate (except basally) shining, impunctate. Antennal seg- 

 ments: i, 0.]6(0.15-0.18); 11^ 0.19(0.10-0.20); III, 0.21(0.20-0.23); 

 IV, 0.25(0.23-0.26); V, 0.32-0.31-0.33). Bucculae about as high as 

 labial II, abruptly terminated posteriorly; labium reaching between 

 middle coxae. Labial segments: I, 0.21 (0.20-0.23) ; II, 0.42(0.41-0.46) ; 

 III, 0.30(0.29-0.32); IV^ 0.19-0.23). 



Pronotum: Length half width, 0.70(0.67-0.74) :1.46(1.43-1.50) ; 

 anterior margin moderately, simply emarginate; lateral margin 

 straight on basal third, basally concealed from above by slightly 

 swollen sides of posterior lobe, with submarginal row of four or five 

 setigerous punctures; transverse impression submedian, obsolete to 

 absent, not marked by special row of punctm-es except laterally; 

 anterior lobe laterally with patch of fine and moderate punctures, 

 anteriorly and medially with fine punctures, calli with few minute 

 punctures; posterior lobe finely punctate medially, punctures coarser 

 towards sides. 



Sciitellum: Length greater than width, 1.15(1.15-1.16) :0.91(0.90- 

 0.93) ; surface shining, with numerous minute to fine punctures, these 

 becoming coarser apically. 



501991—60 8 



