1912.] 



NATURAL SCIENCES OF PHILADELPHIA. 



205 



pronounced interantennal sulcus and very different terminal joint of 

 the maxillary palpi, the edges of which 

 when viewed from the side form an 

 isosceles triangle, owing to the fact that 

 this joint expands widely distad and is 

 very obliquely truncate. The pronotum 

 is proportionally narrower and smaller 

 in both sexes, the caudal femora are less 

 strongly inflated, while in the male the 

 subgenital plate is very slightly less 

 produced obtuse-angulate and in the 

 female it is semi-ovate, broadly obtuse- 

 angulate emarginate at the apex. 



Type : cf ; Isle of Hope, Chatham 

 County, Georgia, in heavy undergrowth 

 of green plants and vines, September 3, 

 1911. (Rehn and Hebard.) [Hebard 

 Collection.] 



Description of Type. — Size smaller 

 and more slender than C. antillarum. 

 Head very small, the interantennal space roundly produced, divided 

 vertically by a distinct though minute sulcus. Maxillary palpi with 

 greatest length of terminal joint a very little more than greatest 

 length of penultimate joint. Terminal joint conical, sharply expand- 

 ing distad, very obliquely truncate, so much so that when viewed 

 from the side the edges form an isosceles triangle, the equal sides 



Fig. 11. — Cryptoptilum trigo- 

 nipalpum. Dorsal view of 



type. (X 4.) 



Fig. 12. — Cryptoptilum trigonipalpum. 

 Maxillary palpus. (Greatly magni- 

 fied.) 



J° 6 o 



Figs. 13-16. — Oblique views and rela- 

 tive terminal circumference of distal 

 joint of maxillary palpus of Cryptop- 

 tilum antillarum (figs. 13, 14) and 

 C. trigonipalpum (figs. 15, 16). 

 (Greatly magnified.) 



formed by the diameter of the apex and the shortest lateral dimen- 

 sion. Pronotum narrower than in antillarum, general form of 

 pronotum and tegmina as in that species. Cerci nearly as long as 

 the length of the entire body. Cephalic face of cephalic tibiae with 

 tympanum as in antillarum. Hind femora considerably less dilated 

 than in antillarum, armament of limbs similar. 



