252 PROCEEDINGS OF THE ACADEMY OF [May-Oct..-. 



Ligocatinus sordidus new species. (Plate X, flgs. 17 and 18.) 



Allied to L. olivaceus (Brunner), from southeastern Brazil, Para- 

 guay and northern Argentina, having much in common, in addition 

 to the similar coloration of the two forms, but differing in the greater 

 size, narrower fastigium of the vertex, narrower fastigium of the 

 face, more distinctly longitudinal tegmina, which have a coarser 

 reticulation than those of olivaceus, in the proportionately more 

 slender and elongate limbs and in the decidedly more slender and 

 elongate ovipositor. We do not know the male of the species, but 

 are very certain it is not the female of L. long icercatus (Brunner) , 

 which was based on the male sex alone, as the size and coloration 

 are quite different. 



Type. — 9; Corumba, State of Matto Grosso, Brazil. March.. 

 (H. H. Smith, highland.) [United States National Museum.] 



Size medium, form more elongate and compressed than in L. 

 olivaceus. Head with the occiput and interocular space full and 

 strongly rounded, the latter moderately declivent to the fastigium, 

 which is narrow, compressed, sulcate dorsad, with the distal ex- 

 tremity weakly inflated, nearl}^ in contact with the acute-angulate 

 but apically blunted fastigium of the face, the outline of the fas- 

 tigium of the vertex, when seen from the side, being concave, the 

 juncture with the vertex proper marked by a slight inflation: eyes 

 large, quite prominent when seen from the dorsum, broad ovate in 

 basal outline with a distinct ventro-cephalic angle, their depth sub- 

 equal to that of the infra-ocular portion of the genae: antennae 

 about twice as long as the body, proximal joint nearly half as wide 

 as the eye. Pronotum not at all sellate, the dorsal line when seen 

 from the side being straight, lateral angles of the disk not marked 

 cephalad, weakly indicated caudad: disk with the cephahc margin 

 truncate, caudal margin broadly and strongly arcuate; caudal width 

 of the disk contained one and one-third times in the length of the 

 same; lateral margins of the disk gently and regularly diverging 

 caudad ; surface of the disk with a median V-shaped impressed figure : 

 lateral lobes of the pronotum with their greatest dorsal length 

 slightly less than their greatest depth; cephalic margin of the lobes 

 straight, ventro-cephalic angle roundly obtuse-angulate, ventral 

 and caudal margins broadly and regularly arcuate to the distinct, 

 rotundato-rectangulate humeral sinus. Tegmina elongate, the 

 greatest width (at proximal two-fifths) contained about six times in 

 the greatest length of the same; reticulations coarse and open com- 

 pared with those of L. olivaceus; costal and sutural margins sub-- 



