12 MANDIBULATA, HYiMKXOl'TERA. 



alluded to ; the sexes (if such they be) being very dissimilar to each 

 other. 



Sp. 1. Ameririae. Nigra cinereo-pubescens, lahro clypeoque albidis, antennis 

 articulo ultimo tibiis tarsis ventre anoque ferrugineo-testaceis. (Long. corp. 

 9—9^ lin. ; Exp. Alar. 14—15 lin.) 



Te. Amerinae. Linne. — CI. Amerinae. Steph. Catal. 325. No. 3749. 



Black, -with an ashy pubescence ; labrum and clypeus whitish, the former 

 strongly cordate, with the base much rounded ; antennse ferruginous at the 

 apex ; abdomen the same beneath, its apex and two last segments above 

 more luteous ; legs rusty-testaceous, with the femora black ; wings hyaline, 

 with the second areolet and the apex brownish. 



1 have never seen the female (unless, as I strongly suspect, the following insect 

 be it) ; but, according to Olivier, it differs in having nearly the entire upper 

 part of the abdomen entirely testaceous, and the femora blue-back. 



The larva feeds on the willow. 



Of this very rare insect the only examples I have seen were 



captured near Windsor ; one being in the British Museum, the other 



in my own collection. 



Sp. 2. marginata. Nigra, antennis apice tibiis tarsisque luteis, abdomine seg- 

 mentis posticis margirie ventris fasciis et margine labroque albis. (Long, 

 corp. 8— 10 lin.; Exp. Alar. 15—18 lin.) 



Te. marginata. Linne. — CI. marginata. Curtis, v. ii. pi. 93. — Steph. Catal. 325. - 

 No. 3750. 



Black ; head and thorax with a slight ashy pile ', antennae with the apex 

 ferruginous; labrum and anterior portion of the clypeus whitish ; abdomen 

 somewhat glabrous, the two basal segments entirely black, the remainder 

 with broad whitish margins, of which die first two, on the 3rd arid 4th 

 segments, are interrupted; all the segments beneath also margined with 

 yellow-white; apex ferruginous; legs black, with luteo-testaceous tibiae 

 and tarsi: wings hyaline, with the second costal areolet and the apex fus- 

 cescent. 

 Of this (which I suspect to be the female of the preceding), the 



specimens in the British Museum and my own collection are the only 



examples I have seen : they were taken near Windsor. 



Gkkus IV.— ZAR.EA, Leach. 



Antenna; 6-jointed, short, two basal joints transverse, 3rd long, slender, a little 

 curved, 4th short, rather stouter, 5th and 6th forming a club, with an obtuse 

 apex: 7naxillar2/ paJpi composed o( 6 unequal joints, the first three being 

 short, the others more or less elongated: head small, much narrower than 

 , the thorax: eyes luiited behind in the male: ocelli 3: ivings as in Cimbex : 

 Aof/»/ glabrous : abdomen cylindric in the males, ovate in the females ; the 



