508 PROCEEDINGS OF THE NATIONAL MUSEUM vol. in 



k son extremity, qui est l^gferement impressionn6e: disque discrfetement ponctu^, 

 filytres avec la corie et I'espace marginal presque lisses, la ponctuation etant trfes 

 fine, les series prfes des nervures trfes senties: plaque mate sup^rieure atteignant 

 k la base le bord lateral, presque lisse, I'inferieure avec la ligne lat(5ral presque 

 droite, h peine striee: les espaces lisses, glabres. Canal ostiolaire plus large vers le 

 sommet qu'^ la naissance et termini par un lobe arrondi, 6chancrd en arrifere avec 

 une petit valve arrondie. 



Cette espfece est trfes voisine de VHom. congruus, dent elle diflffere par I'ostiole et 

 surtout par le lobe median qui ne prdsente pas les deux spinules. 



Type data. — The type (Rijks) was reported from Cordoba, Argen- 

 tina. 



Discussion. — Dr. Blote compared certain specimens with the type 

 and made possible the present definition of this form and pointed 

 out the differences between it and P. semibrunneus, new species. He 

 confirmed most of Signoret's description of the species, but reported 

 that there are only two setigerous punctures on the left costa and three 

 on the right — iniformation that made it possible to establish that 

 Signoret's sketch does not differentiate the hairs of the costa from 

 those of the abdomen so that there appears to be nine present on each 

 costa. Dr. Blote further pointed out that the head does not have 

 distinct, transverse rugae such as are present on the head of the new 

 species semibrunneus. 



Genus Prolobodes Amyot and Serville 



Lobostoma Amyot and Serville, 1843, p. 87 (nee Berthold, 1827, p. 528, in Trema- 

 toda; nee Rafinesque, 1831, p. 5, in Coelanterata; nee Gundlach, 1840, p. 

 356, in Mammalia). 



Prolobodes Amyot and Serville, 1843, p. 676. 



Discostoma Scudder, 1890, p. 452. 



Diagnosis. — Tliis genus is remarkable among all genera of 

 Cydnidae, except Scaptocoris, by reason of the large, semicircular, 

 foliaceous lobe on the second segment of labial II (fig. 36). It is 

 easily separated from Scaptocoris by many characters, not the least 

 of which is the fact that the members of Prolobodes have the anterior 

 tarsi inserted at the tip of the tibia (fig. 122) instead of near middle 

 of tibia as in Scaptocoris (fig. 115). 



Description. — Size very large (11.5-17.0), dorsum nearly as 

 strongly convex as venter, shape oval, greatest width posterior to 

 midlength. 



Head: Length about two-thirds width, oblique, flattened except 

 for tumid interocidar area and strongly reflexed juga (fig. 36); jugal 

 margins entire, with submarginal row of thirteen to sixteen coarse, 

 close-set setigerous punctures bearing long hairlike setae but no 

 blunt, peglike setae; eyes prominent; ocelli large, situated on or 

 behind line connecting posterior margins of eyes, separated from 



