126 ON A NEW SPECIES OF THE GENUS LESTOPHONUS, WILLISTON. 



the tarsi brownish-yellow. Wings greyish-hyaline, the veins 

 brown, with the fourth and fifth longitudinal veins much paler 

 from the hinder transverse vein 

 to the posterior "J^-^ ^^^^■ ^^^"^^^^ margin. Auxil- 

 iary vein brown- ^-^^-^ ^ j is h -yellow, 



indistinct, close V j\\"^"""^~ ^/ ^^ ^^^ first 



longitudinal, \\ ^X,,^^,,^-^ determinable 



^s far as oppo- site to, or a little 



past, the origin of the second longitudinal, continuing from thence 

 to the costa as a very pale line. First longitudinal always rounded 

 at the bend. Middle transverse vein situated somewhat beyond 

 tne tip of the first longitudinal vein and nearer to the hinder 

 transverse vein than to the origin of the second longitudinal. 

 Hinder transverse vein forming with the fifth longitudinal an 

 angle less than a right angle. Ultimate section of the fifth longi- 

 tudinal vein not twice the length of the hinder transverse vein. 

 Bred from MonoiMehus Crawford^ Mask., in February. 



Ohs. — A small specimen (long.0'042 inch, I'OGmm.) which seems 

 to me to be a male, has the middle transverse vein mid-way 

 between the origin of the second longitudinal vein and the hinder 

 transverse vein. 



If this genus is to be placed in the Oscinidse, it appears to me 

 that it must occupy that position as a somewhat anomalous 

 genus. Not only is the arista to the antennae entirely wanting 

 and the anal cell present, but I can also detect a rudimentary 

 auxiliary vein and a pale posterior basal transverse vein. As in 

 certain other genera of the Oscinidae, these flies have the posterior 

 tibiae a little curved. 



Note. — I have recently seen "Insect Life" for Jan., 1889, 

 issued by the U.S. Dept. Ag. in which a correspondent states that 

 he is glad the identity of the parasite (Lestophoniis) found on 

 Monophlebus and leery a is considered proved beyond a doubt, 

 but surely this decidedly erroneous conclusion cannot have been 

 arrived at by an examination of the insects. 



