Scudder.] 266 [December 16, 



w 

 ACRYDII. 



16. Astroma hastata nov. sp. 



Very closely allied to A. acuminata (Cephaloccema acuminata 

 Scudd.), but differing from it in its longer and less pointed tubercle 

 of the vertex, its longitudinally vittate head and prothorax, its 

 smooth prothorax 1 and rather stouter legs. 



Length of body, exclusive of head, 64 mm. ; whole length of head, 

 21 mm.; length of tubercle beyond the eye, 10 mm. ; of antennas, 5.25 

 mm. ; of prothorax, 16.5 mm.; of mesothorax, 4 mm.; of hind femora, 

 24 mm. 1 ?, Eastern slope of the Peruvian Andes. 



The generic name Astroma (1841) has priority over Cephaloeasma 

 (1843). 



17. Mastax nigra nov. sp. 



Head, whole upper surface of prothorax and tegmina, together 

 with the terminal joints of the abdomen and the smaller joints of 

 the antennas, black; rest of body, together with the basal joints of 

 the antennas, the adjacent parts of the front, the labrum and mouth 

 parts, yellow ; anterior four legs yellow, but the tarsi blackish in- 

 fuscated, and the two superior carinas of both femora and tibias 

 blackish ; basal half of hind femora yellowish brown, two superior 

 and two inferior carinas black ; rest of hind legs, including tarsi, 

 black ; the middle of the outer half of the femora faintly banded 

 above with yellowish ; wings uniform chalky white. Tegmina and 

 wings equal, reaching, when at rest, far beyond the tip of the 

 abdomen. 



Length of body, 15.5 mm.; of tegmina, 20 mm. ; of hind tibias, 16.5 

 mm. 4 cT, Eastern slope of the Peruvian Andes. 



18.. Mastax Gundlachii nov. sp. 



Head testaceous, the antennas concolorous, very short. Body 

 brownish testaceous, the lower portion of the lateral lobes of the pro- 

 notum with a triangular blackish area, pointed forward ; posterior 

 borders of the abdominal joints dusky ; hind tibias reddish toward 

 tip, the spines largely tipped with black. Tegmina exceedingly mi- 

 nute, no longer than the shorter diameter of the eye, bluntly pointed 

 at tip. Wings wanting. 



1 My description of C. acuminata has one very strange inaccuracy; for " Pro- 

 thorax slightly rugose, with short, transverse, impressed lines and punctures," 

 read: Prothorax sparsely covered with slight, rounded, punctured tubercles, and 

 furnished with slight medio-dorsal and lateral carinas. 



