74 Eev. T. A. Marshall's monograph of 



sent specimens of the ? to Nees from Italy. Wesmael 

 was acquainted with 2G of both sexes, taken on windows 

 and on the fence of a botanic garden. Reinhard 

 examined only a single pair from Von Heyden's col- 

 lection, and doubts their distinctness from D. ohliteratus, 

 Nees, in which the legs are piceous, &c. 



iii. HiSTEEOMERUs, Wesm. 

 Wesm., Nouv. Mem. Ac. Brux., 1838, p. 63. 



Head depressed, elongate behind the eyes, which are small ; oral 

 aperture large, transverse; maxillary palpi 6-, labial 4-jointed; 

 antennae ^ ? submonihform, shorter than the head and thorax ; 

 abdomen sessile ; suturiform articulation obsolete ; four anterior 

 legs very short, with clavate tibiae, shorter than the tarsi ; hind 

 tibioe and tarsi of equal length, the metatarsus longer than the 

 other joints together, curved, incrassated at the base and gradually 

 diminishing to the apex, where it is again slightly enlarged ; three 

 cubital areolets in the fore wings ; 2d intercubital nervure sub- 

 obsolete ; transverse nervure evected ; prae- and pobrachial areolets 

 of equal length ; anal nervure not interstitial ; pobrachial nervure 

 sinuated not far from its origin ; radial areolet narrow, elongate ; 

 nervures of the hind wings as well defined as those of the fore ; 

 radius, cubitus, and prasbrachial transverse complete ; pobrachial 

 areolet not half the length of the prasbrachial. 



1. Histeromerus mystacinus, Wesm. (PL III., fig. 1). 



Histeromerus mystacinus, Wesm., Nouv. Mem. Ac. 

 Brux., 1838, p. 65, ? ; pi., f. 5 (wing) ; ff. A— E 

 (details) ; S. v. VolL, Schets., ii., tab. 5 (wing). 



Piceous, smooth ; head and thorax black ; antennae fuscous, 

 testaceous at the base ; legs, stigma, nervures, and valves of the 

 terebra, piceo-testaceous ; terebra less than h the abdomen. <y ? . 

 Length, J 1 ; wings, 2| : 5 If ; wings, S^ lines. 



Antennae cT ? about li times as long as the head, 17 — 20-jointed, 

 the joints discrete, equal, subquadrate, except the last, which is 

 ovate, acuminate. The shape of the head suggests that of Bcthylus 

 or Epyris. Palpi and maudiljles pale, the former beset with long 

 hairs ; prothorax piceous ; 1st abdominal segment rectangiilar, 

 somewhat longer than its width, with two curved lateral im- 

 pressions enclosing a smooth space ; terebra rufous, the valves 

 piceous, darker at the apex. The ^ corresponds in all respects, 

 but is much smaller ; the thorax is piceous instead of black. 



