40 MANDIBULATA. HYMENOPTKRA. 



§ 5. Antenna short, 9 or 10-jointed, with the appearance of an 11th, thickened 



in the middle, and acuminated at the apex, the 3rd joint longer 



than the 4th ; body short and stout. 



Genus XIV.— MESSA, Leach. 



Antennw rather slender, 9-jointed, two basal joints short and robust, 3rd 

 elongate, 4th shorter, remainder gradually diminishing in length to the 

 apex: mandibles small: labrum rounded: head transverse: z^mg-i ample; 

 anterior with 1 marginal areolet, and 4 submarginal ones, the 1st smalJ^ 

 rounded, 2nd elongate, 3rd quadrate, 4th extending to the apex: body short, 

 acute at the apex : legs slender, simple, tibice with two short acute spurs at 

 the tip. 



From the other genera of this section Messa may be recognized by 

 the number of areolets in the anterior wings, there being but 1 

 marginal, and 4 submarginal ones, thereby agreeing in neuration with 

 the insects of the preceding section, from which, however, it differs in 

 the antennas, &c. 



Sp. 1. hortulana. Nigra, ore albo, pleuris pedibusque luteis. (Long. corp. 



1| lin.; Exp. Alar. 4| lin.) 

 Te. (Em.) hortulana. Klug. — Me. hortulana. Steph. Catal. 330. No. 3822. 

 Black : antenns brownish at the apex; labrum and clypeus white; mandibles 



white, with the apex pitchy ; shoulders white ; thorax with a yellowish 



pile; pleurse luteous ; legs also luteous ; wings hyaline, with the nervures 



and stigma brownish. 



Apparently very rare : found within the metropolitan district, in 

 June, and in Devonshire. 



Genus XV.— FENUSA, Leach. 



Antenna short, somewhat clavate, 9-jointed, the 2 basal joints minute, 3rd 

 elongate, 4th shorter, the remainder distinct, somewhat moniliform, gradually 

 diminishing in length to the apex, which is obtuse : labrum emarginate : 

 mandibles short, dentate within : head broad, transverse : ocelli 3 : wings 

 ample ; anterior with 2 marginal areolets of nearly equal size, and with 3 

 dissimilar submarginal ones, the 1st elongate, narrow and curved, 2nd 

 larger, broader, somewhat triangular, receiving 1 recurrent nervure ; 3rd 

 extending to the apex ; body short and stout : legs simple ; tibice with a pair 

 of short acute spurs at the apex. 



The want of a fourth submarginal areolet, combined with the 

 presence of 2 marginal ones, and the short, subclavate, 9-jointed 

 antennae serve to distinguish this genus from its allies ; the species of 

 which it is composed are amongst the smallest of those included in 

 this family. 



