292 Say^s Descriptions of 



joint somewhat gibbous at tip; second segment rounded: 



L, 



Length over three twentieths of an inch. 

 ? Somewhat darker than the male : metathoracic 

 tubercles spiniform ; 6rst abdominal segment aln;ost 

 emarginate at the superior lip; second segment short 

 and wide ; first joint of the antenna long ; head ante- 

 riorly with numerous, approximate, impressed lines. 



Length one fifth of an inch. 



Appeared on the wing July 19th. 



3. M. opposita. 



$Body black, minutely and densely granulated: an- 

 teniKz dusky ; pale yellowish towards the tip ; first joint 

 slightly longer than the second and third together; second 

 joint obtusely obconic : hypostoma convex : mandibles 

 piceous : thorax with a glabrous line extending to the 

 middle : wings dusky ; second cubital cellule turbinate, 

 petiolated from the angle of the discoidal cellule, it? 

 longitudmal nervures equally curved ; nervure separating 

 the second and third cellules in a direct line with the 

 nervure from the stigma; discoidal cellule quadrate: 

 metathorax, spines short, acute: ahdomen polished, not 

 obviously granulated ; second node with an impressed 

 line above, dividing the surface into three slight lobes : 

 venter and feet tbged with piceous. 



Length over three twentieths of an inch. 



Neuter. Dull honey-yellow : head minutely lineat- 

 ed : antenncE, first joint long : stethidium rather largely 

 granulated ; spines prominent, acute, reaching nearly to 

 tbe t,p of the first node: ahdomen glabrous, polished; 

 second node without impressed line. 



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