1874.] 207 



DESCEIPTIONS OF A NEW QENUS AND TWO NEW ^PECIES OF 

 EUROPEAN OXYURA. 



by the eet. t. a. marshall, m.a., f.l.s. 



Fam. DBTINIDES. 



Geuus DEYINUS, Latr. 



Drtinus corsicus, n. sp. 



D. niger, antennis testaceis, nigro-annulatis, apice albido ; alis hyalinis, partim 

 nig ro-nervosis, fascia ante apicem fusca ; femorihus nigris, apice tibiisque piceo-rufis ; 

 tar sis testaceis. $ . Long. 3 ; alar. exp. 3 lin. 



Antennae tricolorous in the living insect, joints 1 — 5 testaceous, gradually growing 

 darker towards the 5th, 6 — 9 black, the last joint formerly white but now yellowish. 

 Body entirely black, hardly shining, except upon the abdomen. Winga hyaline, 

 with a lacteous tinge ; the three longitudinal nervures partly, before the middle, the 

 two recurrent nervures which connect them, as well as the ramus post-marginalis 

 (radius), fuscous ; the other nervures colourless ; stigma white, with a dark apex ; 

 a single broad band of fuscous crosses the wing beyond the middle. 



Sab. : Corsica. 



I have compared this insect with the description of D.formicarius, 

 Latr., and with a drawing which I copied from one lent me by Prof. 

 West wood, taken from Latreille's type specimen. Also with West- 

 wood's description of Campylonyx ampuliciformis (Proc. Zool. Soc, 

 1835, p. 52). Also with the description and figure oi GheJothelius 

 gryps, Eeinh. (Beid. ent. Zeit., 1863, p. 409). And lastly with my 

 specimen of D. tarraconensis, ^e^cvihe^ in this Magazine (iv, p. 203). 

 So far as I can ascertain, these are all the species that have been pub- 

 lished ; and the present individual agrees with none of them. It is 

 nearest to D. tarraconensis, but, besides certain differences of colour, 

 it has structural characters which make it abundantly distinct. 



The legs are much shorter, the femora especially being scarcely 

 half the relative length of those of tarraconensis, and more clavate. 

 The joints of the antennae, the prothorax, and every part of the body 

 to which the idea of length can be applied, are proportionally shorter ; 

 the general effect being the production of q, stouter and more comj^act 

 insect. The punctuation and rugulosity of the head are considerably 

 coarser ; and there is no medial frontal line. The scutellum is smooth 

 and shining, instead of being marked with striae and rugosities. The 

 neuration of the wings offers slight differences, which it would take 

 much time to describe. The wing itself has only one dark fascia in- 

 stead of two, although the nervures are dyed in two places ; and the 

 membrane shows a different texture, and a milky hue not to be found 

 in ta7-raconcnsis. I remember that the tips of the antenna?, and I 



