OCCURRING ABOUT IIOLYWOOD. 171 



•sometimes appearing as three tolerably defined spots ; the double 

 costal spot forms the nucleus of one, another larger embracino- the 

 whole tip of the wing, the third surrounding the ordinary trans- 

 verse nervure. 



This species occurs on the sea-coast, in spots overgrown 

 with Plcmtago maritima. 



T. Centaurea and T. Onopordinis are one species, all interme- 

 diate varieties occurring. 



Lauxania arnica. Nigra, subcenea, vitta frontali cuprea, 

 genubus tarsisque posticis fuscis , alls subhyalinis. (Long. 



.14.) 

 Smaller than L. cylindricornis, with ferruginous antennae (short as 

 in L. longipennis), the seta scarcely pubescent : face glossed with 

 dull white : above the base of the antennae is a transverse line, 

 coppery or reddish : the wings are entirely obscure hyaline, or 

 with a very faint yellowish tinge. 



L. longipennis, Meig. L. basalis, Stcph. ? 



L. sordida. Ferruginea, nitida, anticis Jhiioribus apice tar- 

 sisque fuscis, alis luteis. (Long. .2.) 



Antennae short as in L. longipennis, but the seta scarcely pubescent 

 abdomen short, broad, and rounded, with scattered black hairs. 



Phyllomyza. 



Antennae deflexae, articulo ultimo oblongo compresso, apice obtuso, 

 basi seta, dorsali pubescente : hypostoma subdescendens planum 

 nudum : oculi distantes rotundi : abdomen ovatum quinque-annu- 

 latum : alae deflexae nervo longitudinali primo duplicato. 



L Ph. litura. Sapromyza litura. Meig. 

 Inhabits oak trees ; Tullymore park. 



Heteroneura spurca. Ferruginea, nitida, occipite bimaculato, 

 alis apice nervoque transversa late infuscatis. (Long. 



.17+.) 

 This species differs from the others in having the transverse nervures 

 rather distant, the double subcostal nervure more obviously divided, 

 and the face is a little more inclined inwards ; but there is no 

 other genus with which it can be so well placed : the third joint 

 of the antennae has a dusky spot above, the back of the head two 

 large brown spots : the abdomen in the female ends in an arti- 



