166 WESTERN QUARTERLY REPORTER. 



feet black, with argenteous hair ; abdomen, first, second and third 

 segments, bright rufous ; on the tergum each with a lateral silvery 

 sericeous lunule; terminal segments black, of which the fourth 

 one has a lateral sericeous lunule ; anal segment with a rufous 

 reflection above. 



Length of one specimen eleven-twentieths, of another seven- 

 tenths of an inch. 



With the exception of the tibia, this species, in point of color, 

 resembles L. tricolor F., but differs from it in form, the abdomen 

 in this respect being more closely allied to that of L. ichneumoni- 

 formis. [78] 



2. L. tarsata. — Black j abdomen rufous; tarsi rufous. 



Inhabits Arkansa. 



Body black ; abdomen entirely rufous, drawing on sanguineous; 

 tarsi, with the exception of the first and second ones, rufous ; 

 wings hyaline. 



Length two-fifths of an inch. 



ASTATA Latr. 



A. bicolor. — Black ; abdomen bright rufous, dusky at tip. 



Inhabits Arkansa. 



Head, minutely punctured ; mandibles, pieeous at tips ; ante- 

 rior stemmata of the male, very large; thorax minutely punctured ; 

 wings hyaline ; nervures blackish ; stigma pale rufous ; abdomen 

 rufous sanguineous ; the male black at tip, seutel on the disk im- 

 punctured, polished ; metathorax with crowded dilated superficial 

 punctures. 



Length less than two-fifths of an inch. 



On a transient view this insect resembless Larra tarsata. I 

 obtained it near the Rocky Mountains. 



NYSSON Latreille, Jurine. 



N. 5-spinosxjs. — Black : abdomen fasciate with glaucous ; 

 metathorax four or five spined. 



Inhabits Arkansa. 



Body black ; antennae whitish beneath ; clypeus white with a 

 longitudinal black line ; mandibles black : margin of the collar 

 tuberculi, (Kirby,) an oblique interrupted line above the wings, 

 scutellar line and tips of the metathoracic spines, whitish : spines 



