-V 



.M. 



372 



Say's Descriptions of 



Lyeoda. 



W Stemmata, three. 



4. L. triloba. Deep black, immaculate : head anterior 

 to the antenna witli a slight silvery reflection : mandibles 

 dull rufous towards the base : collar somewhat trilobate, 

 or having above, an obvious angle in the middle and a 

 more obtuse one on each side : thorax having a distinct, 

 impressed, longitudinal line before : wings purple-fuligi- 

 nous, almost opake ; recurrent nervures rather distant at 

 their junction with the second cubital cellule ; tergum in 

 a particular light, more obviously sericeous on the posterior 

 margins of the segments. 



Length over half an inch. 



This has very much the appearance of LarUa jEtUops, 

 Nob. but is much larger. In that species also the collar 

 is emarginate in the middle, the wangs are but very slightly 

 tinted, and the recurrent nervures approximate at their 

 junction with the second cubital cellule ; it has but one 

 ocellus, and the mandibles are not obviously armed with a 

 tooth on the inner edge. 



Black ; tergum, segments margined 



^4 ^ 



/■ 



^ 



5. L#. suhita* 



Inhab 



metathorax 



9 Body black : head before with a somewhat silvery 



an 



middle : wings at tip dusky ; recurrent nervures entering 

 the second cubital cellule, at a distance from each other ; 

 third cubital cellule but little narrowed : metathorax with 

 small, transverse wrinkles on the disk as well as on the 

 sides : tergum, posterior margins of the segments with a 

 silvery reflection. 



Length 



