202 



PROCEEDINGS OF THE ACADEMY OF 



[June,. 



nearly the same width throughout. The insect is very much the 

 same size as antillarum, but the dorsal surface of the head is more 

 flattened, while the interantennal protuberance is more sharply 

 rectangulate. As in C. trigonipalpum, the tympanum on the cephalic 

 face of the cephalic tibia is circular, not oval as is usual in C. antillarum. 

 The last three segments of the maxillary palpi are much as in antil- 

 larum, but are more robust in proportion to their length. The 

 pronotum is proportionally longer and its sides are subparallel. The 

 caudal femora are much the same as in antillarum, and the armament 

 of the limbs is similar. 



Type: d" ; Salina Cruz, Oaxaca, Mexico; December 22, 1898. 

 [Hebard Collection.] 



Description of Type.— -Size medium for the group. Head small, 

 interantennal space produced and sharply rounded, divided by a very 



minute subobsolete longitudinal sulcus. 

 Maxillary palpi with fourth joint from 

 distal extremity nearly twice as long as 

 broad, considerably longer than in C. 

 antillarum. Eyes pyriform, subvertical, 

 somewhat larger and slightly more promi- 

 nent than in antillarum. Pronotum when 

 seen from above subequal in width, 

 considerably produced caudad, the entire 

 dorsal surface transversely gently arcuate, 

 more decidedly so than in antillarum, the 

 caudal margin subtruncate. Tegmina 

 wholly concealed dorsad by the pronotum, 

 a portion of the lateral field may be seen 

 to embrace the abdomen, though in this 

 species the peculiar shape of the pronotum 

 causes the lateral lobes to embrace the 

 sides of the body to nearly the caudal margin of the pronotum. 

 Cephalic tibiae with cephalic face bearing a large, circular and distinct 

 tympanum. Limbs, and armament of the same, much as in antil- 

 larum. 



Measurements (in millimeters). — cf : Length of body, 8.2; length 

 of pronotum, 5.2; cephalic width of pronotum, 2; caudal width of 

 pronotum, 2.1; length of caudal femur, 5.3; width of caudal femur, 

 1.8. 



Color Notes. — Ground color of dorsal surface of pronotum russet. 

 Dorsal surface of head and all of abdomen blackish-brown. Other 



Fig. 9. — Cryptoptilum tubula- 

 ium. Dorsal view of type. 

 (X 4.) 



