354 ENTOMOLOGICAL NEWS. [Oct., '07 



the greater longitudinal arching of the same. In the male 

 the more rounded eye, the narrower interocular space and 

 frontal costa, more prominent lateral angles of the pronotum 

 and the longer, more attenuate cerci will separate the new 

 form. In the female the caudal expansion of the pronotum, 

 the more prominent lateral angles of the pronotum and the 

 longer lateral lobes, as well as the longer and somewhat slen- 

 derer caudal femora, will distinguish truncatus from enigma. 



Size rather small ; form moderately compressed and slender for the 

 genus. Head with the occiput arched and slightly, but distinctly, ele- 

 vated above the general level of the disk of the pronotum ; interspace 

 between the eyes not (q*) or very slightly ( $) wider than the inter-anten- 

 nal portion of the frontal costa ; fastigium moderately declivent, distinctly 

 sulcate in both sexes, though more deeply and with sharper lateral mar- 

 gins in the male; when viewed laterad the fastigium rounds into the line 

 of the face, which is slightly produced between the antennae ; frontal 

 costa at the junction with the fastigium hardly wider than the proximal 

 joint of the antennae, regularly expanding ventrad to the ocellus, not 

 marked ventrad of this, slightly depressed around the ocellus, not sulcate 

 but biseriate-punctate ; eyes ovate, more flattened cephalad in the female 

 than in the male, in both sexes very distinctly longer than the infra-ocular 

 sulcus, when viewed from the dorsum the eyes are moderately prominent 

 in the male ; antennae almost equalling the head and pronotum in length 

 in the female. Pronotum subdeplanate dorsad in the male, slightly tectate 

 in the female ; cephalic margin of the disk subtruncate, caudal margin 

 subtruncate with a very sligh't median emargination, lateral margins angu- 

 late but not carinate, the angle somewhat rounded on the metazona of the 

 female ; median carina distinct in both sexes, evanescent between the 

 sulci, weaker in the female than in the male, prozona half again as long 

 as the metazona in the male, slightly less than half again as long in the 

 female ; transverse sulci more marked in the male than in the female ; 

 disk of the pronotum of a greater width caudad in the female than pro- 

 portionately in the male ; when viewed laterad the dorsal outline of the 

 prozona is slightly but distinctly arcuate ; lateral lobes distinctly longer 

 than deep, the cephalic margin gently arcuate, the caudal slightly sinuate, 

 both converging, ventral margin very broadly and bluntly angulate ; met- 

 azona on dorsum and lateral lobes closely and sharply punctate. Teg- 

 mina abbreviate ; lateral, not attingent dorsad, nearly twice as long as 

 broad in the male, half again as long as broad in the female, apex ob- 

 liquely subtruncate. Abdomen tectate in both sexes, slightly ( 9 ) or 

 strongly (tf) compressed, apex recurved in the male ; form of the furcula 

 cannot be ascertained on account of the strongly recurved apex ; cerci 

 rather broad, subequal in the proximal third, tapering regularly thence 

 to the narrow but blunt apex, which also has a slight curve toward the 



