OP NATURAL lilbTORY. 761 



the second cubital cellule and second recurrent ncrvurc niarj;inc-d 

 with whitish, the latter abbreviated before the anal tip : abdimion 

 subsessile ; with the exception of the first segment, piceouj" 

 blackish : feet honey -yellow. 



Length over three-twentieths of an inch. 



The second cubital cellule is somewhat larger than u>ual, and 

 the nervures which form it, as well as the second recurrent ner- 

 vure, are less distinct than usual. 



2, r. ANNULATUS. — Black J mandibles white; feet yellowiinh. 



Inhabits Indiana. 



9 Body black, polished, minutely punctured : antennae, ba.««al 

 joint white; second joint piceous : nasus prominent in the mid- 

 dle : mandibles and palpi white: wing-scale dull honey -yellow : 

 wings hyaline ; nervures blackish, tinged with yellow at ba«e ; 

 first and second cubital cellules receiving their appropriate re- 

 current nervures : metathorax with larger punctures and linef : 

 abdomen polished, impunetured, subsessile, the petiole being very 

 short : pleura with a small whitish dot under the wing-scale : 

 feet honey-yellow. 



Length one-fifth of an inch. [380] 



% Ilypostoma silvery : nasus rounded : antennae annulate, 

 one-half of each joint being yellowish. 



Length over three-twentieths of an inch. 



ALYSOX Jur. 



1. A. OPPOSITUS. — Black; feet honey-yellow; tergum with 

 two yellow spots. 



Inhabits Indiana. 



9 Body black : mouth, hypostoma and anterior orbits yellow ; 

 antennae at base beneath yellow : thorax with an obsolete yellow 

 spot before the wings each side : wings very slightly tinte<l with 

 dusky, more particularly in an obsolete band toward the tip: ner- 

 vures fuscous : stigma brown : recurrent nervures entering the 

 petiolatcd^ cellule exactly opposite to its bounding nervures: 

 Bpines very short: feet honey-yellow: tergum polished, firj«t 

 segment honey-yellow; second segment with a large, lobatoly- 

 rounded, bright yellow spot each side at base; the b.i,se i.x a\po 

 obsoletely honey-yellow. 

 1837.] 



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