British Species of AllotrincB. 57 



A. brevis Thomson comes very near this species, but 

 it has the antennae only the length of the thorax. 



Hab. Cadder Wilderness near Glasgow, Dumfries, Peck- 

 ham {T.R. Bilhips). 



ALLOTRIA COLLINA, sp. nov. 



Black; the oral region, the thorax and base of abdomen, 

 castaneous ; the basal four joints of the antennae and legs 

 pallid testaceous ; the femora inclining to castaneous. 

 Wings hyaline, the nervures fuscous. Antennae nearly one- 

 half longer than the body, thickened gradually (but not 

 strongly) towards the apex ; the third joint not much longer 

 than the second ; the last longer than the penultimate. 

 Radial cellule elongate; the third abscissa of radius two 

 and a half times the length of the second. 9. 



Length ^ mm. 



Most nearly related to A. dolichocera, but readily known 

 by the castaneous thorax and base of abdomen, by the more 

 slender and, if anything, longer antennae, by the clear colour 

 of the legs, and by the more elongated radial cellule. 



Hab. Mugdock. 



Allotria filicornis, sp. nov. 

 Black ; the head red, castaneous on the top ; the legs 

 and five basal joints of the antennae clear yellow ; joints 

 ^ — 13 fuscous ; wings hyaline, the nervures testaceous ; 

 metathorax and base of abdomen covered with long pale 

 hair. Antennae filiform, not thickened towards the apex ; 

 the third joint a little longer than the fourth, and both are 

 longer than the fifth; the last joint is fully one-fourth 

 longer than the penultimate. Radial cellule elongate, wide, 

 twice longer than wide ; the first abscissa of radius three- 

 fourths of the length of the second ; the third roundly 

 curved, two and a half times the length of the second. The 

 6 has the fourth and fifth joints curved ; the third is as long 

 as the fourth ; the two last are subequal. 



