22 



bles. Head rather smooth, long, uniformly tapering to the eyes, the 

 vertex rather long, marginate, constricted slightly between the eyes; 

 back of the head from between the eyes half way to the prothorax 

 with an insignificant carina; front with a slight median ridge from 

 eyes to labrum. Thorax scabrous with irregular, elevated, rough 

 points, becoming very short, transverse ridges on the dorsum. Legs 

 rather slender (the hind pair lost) . Length of head, exclusive of 

 vertex .37 in.; of vertex beyond eyes .08 in.; of antennae .16 in.; of 

 prothorax .42 in.; of fore tibiae .52 in. One specimen, the abdomen 

 of which is broken, from Napo or Maraiion. 



15. Cephalocssma acuminata nov. sp. 



Body reddish brown. Head smooth, forming a greatly elongated 

 cone, just below the middle of which the eyes are hardly prominent; 

 above the eyes the tubercle becomes quadrate; below the eyes there 

 is a rounded frontal carina. Prothorax slightly rugose with short, 

 transverse, impressed lines and punctures; meso- and metathorax 

 ■with slightly impressed cnrving lines and deeper punctures, which 

 markings continue upon the basal segments of the abdomen, the lines 

 becoming finer and more indistinct posteriorly. Legs slender. 

 Length of body, exclusive of head 2.3 in.; whole length of head .8 

 in.; length of tubercle beyond the eyes .35 in.; of antenna; .16 in.; 

 of prothorax .48 in.; of mesothorax .12 in.; of hind femora 1 in. 

 One ? . Between Quito and Napo. 



16. Xiphieera octomaculata nov. sp. 



Brownish; antennas, excepting base, brownish fuscous; tubercle of 

 vertex, viewed from above, twice as long as broad, the apex broadly 

 rounded. Lateral carinae of pronotum scabrous with frequent tuber- 

 cules, anterior border with little raised points, posterior border less 

 than a right angle. Tegmina, each with four long and slender, some- 

 times confluent, dull luteous spots, bordered heavily with black, and 

 arranged along the costal border nearly to the tip ; wings yellowish, 

 with luteous veins and a black outer border, which is very broad at 

 the apex and very narrow at the inner angle. Hind tibiae having the 

 inner row of spines greatly produced, in the plane of the movement 

 of the leg, into long, nearly straight, black tipped spines, the upper 

 ones very broad and flatly compressed at base. Length of body 1.6 

 in.; of tubercle of vertex .12 in.; of tegmina 1.52 in.; of hind 

 femora 1 in.; of longest tibial spine .11 in. One S. Napo or 

 Maraiion. 



17. Lophacris Humboldtii nov. gen. et sp. 



Vertex, summit and upper portion of sides of head smooth; front 



PROOKEDINBS B. 8. N. H.— VOL XII. 22 APEIi, 1869. 



