1912.] NATURAL SCIENCES OF PHILADELPHIA. H»: 



1905. Cycloptilus Mor.se (not Cycloptilum judder, 1868), Psyche, XII, p. 21. 



1905. Liphoplus Rehn and Hebard (not of Saussure, 1877), Proc. Acad. 

 Nat. Sci. Phila., 1905, p. 49. 



1906. Liphoplux Rehn (not of Saussure, 1877), Bull. Amer. Mus. Nat. Hist., 

 XXII, p. 117. 



1907. Liphoplus Rehn and Hebard (not of Saussure, 1877), Proe. Acad. 

 Nat. Sci. Phila., 1907, p. 316. 



1909. Liphoplus Rehn (not of Saussure, 1877), Second Rept., Cent, Exp. 

 Sta. Cuba, p. 220. 



1910. Liphoplus Rehn (not of Saussure, 1877), Proc. Acad. Nat. Sci. Phila., 

 1910, p. 10. 



1911. Cycloptilus Sherman and Brimley, Ent. News, XXII, p. 391 (in part). 



Genus includes five species. Genotype. — Cryptoptilum antillarum 

 [Eetatoderus antillarum] (Redtenbacher). 



Generic Description. — Form depressed, compact, surface clothed 

 with scales; pronotum produced caudad in male; tegmina absent 

 in female, concealed by pronotum in male. 



Head small, rounded, produced cephalad; interantennal pro- 

 tuberance with trace of vertical division. Pronotum of male 

 narrow cephalad, produced caudad, in length equal to about 

 half of the entire length of the body; of female sub-quadrate. 

 Tegmina of male concealed by disk of pronotum, tympanum 

 perfectly developed, caudal margin of dorsal field of tegmina 

 strongly arcuate; lateral field of tegmina well developed. Ovi- 

 positor nearly straight, narrowly sub-lanceolate at apex, the latter 

 with margins unarmed. Subgenital plate of female with distal 

 margin complete or angulate-emarginate mesad. Cerci of both 

 sexes elongate, tapering. Cephalic tibiae with the cephalic face 

 bearing a distinct tympanum. Caudal femora much dilated; 

 armament of limbs as in Cycloptilum. 



Distribution in North America. — Extending from central North 

 Carolina southward to extreme southern Florida and westward to 

 Brazos County, Texas. The genus is also found in Lower California 

 and has a wide insular distribution, having been recorded from 

 Bermuda. the Bahamas, Cuba and St. Vincent. 



Key to Cryptoptilum. New Genus. 



A. Terminal joint of maxillary palpi moderately elongate, expanding 



gently distad, gently obliquely truncate. 



B. Pronotum of male widening gradually but distinctly caudad. 



C. Pronotum of male with cephalic width contained about 



two and three-quarters times in the greatest length 



of the same, much produced caudad; subgenital plate 



of female broadly truncate distad with no emargina- 



tion hesperum n. sp. 



