368 Annals of the Carnegie MusEU^^. 



the tips extending beyond the apex of the hind femora, obliquely 

 rounded from below. Costal area with the transverse veins somewhat 

 irregular, the median vein reaching the costal margin at about the 

 middle of the tegmen. Anterior femora below three-spined in front 

 and four-spined behind; anterior tibiae four-spined on both margins, 

 the spines robust and blunt at tips, decreasing in length from base to 

 apex; middle tibiae two spined externally and provided internally with 

 two to three minute spines. Ovipositor normal, the cerci curved, 

 evenly tapering, reaching a trifle beyond the middle of the slender 

 portion of the ovipositor. 



Length of body, 9 , 14 mm., of pronotum, 3 mm., of tegmina, 

 14. 5-15 mm., of hind femora, 10.5 mm., of ovipositor, 3.5 mm. 



Habitat. — Puerto Suarez, Bolivia, at 150 meters elevation above sea- 

 level, November to January, 29 9, collected by J. Steinbach. Two 

 others, also females, come from the " Province del Sara," at an altitude 

 of 350 meters, where they were taken in December. Still a fifth 

 example is at hand. This latter bears the label "Sao Luiz de Caceres, 

 Rio Paraguay, Matto Grosso, Brazil, May 17, 1909." It was taken 

 by J. D. Haseman. The type is in the Carnegie Museum. 



Genus Macrometopon gen. nov. 



The insect which is the type of the present genus is a representative 

 of the family Listroscelidce. It is related to Carliella Karney, and 

 might be placed in that genus, were it not for the differences in the 

 development of the mandibles. 



The present genus may be characterized as follows: Head very large, 

 considerably wider than the anterior portion of the pronotum, the 

 occiput rounded, without a longitudinal median carina; fastigium of 

 the vertex greatly compressed, much narrower than the diameter of 

 the first antennal joint, its apex somewhat advanced and widely 

 separated from the fastigium of the front; lower part of the face and 

 especially the mandibles and labrum considerably elongated as in 

 Anostostoma and one or two other genera of the family Stenopelmatidce. 

 Maxillary palpi elongate, slender. Eyes prominent, slightly elongate; 

 ocelli small, the median situated just within a line drawn from the 

 lower margin of the eyes. Pronotum broadest above the insertion 

 of anterior legs with the anterior edge wider than the posterior, the 

 latter elevated and almost straight behind, the front also nearly 

 straight, principal sulcus very profound; lower edge of the lateral 



