262 [November, 



ON THE BRITISH SPECIES OF PHOEA. (Paet I). 



Br DR. JOHN H, WOOD. 

 (Continued from page 196). 



42 (39) Onl^ one pair of dorso-central bristles* 



43 (44) A dusky spot in the wing at the origin of the first thin vein ; middle tibise 



with two inside spurs. 



$ $ . Thorax and abdomen black, the latter dusted with whitish ; 

 halteres pale ; frons broad, with both rows of bristles strongly convex 

 in front ; third joint of antennae large, black, and lemon-shaped ; 

 wings dark yellowish-grey, thin veins sometimes clouded, first costal 

 division rather shorter than the other two together ; femora dark 

 brown, almost black, tibiae and tarsi more yellow ; hind tibiae with 

 four spines, one in the middle of the under-side and three on the 

 outer side, namely, one in the upper third and a pair close to the 

 lower end. A spring species. Larva lives on dead snails. 



3 mm. — maculata, Mg. 



44 (43) Wings without a spot ; middle tibix toith only one spur (normal). 



45 (46) Thorax deep black ; four strong and equal scutellar bristles. 



S . Halteres yellow or black (one specimen) ; frons rather nar- 

 row (1^ to 1) and dull, both rows of bristles strongly convex in front ; 

 third joint of antennae red, moderately large and lemon-shaped ; the 

 yellow palpi small, rather narrow, and with the usual long marginal 

 bristles ; wings nearly clear, costa to the middle of wing, first costal 

 division twice as long as the other two together, first thin vein comes 

 off at the fork with a very slight curve and then runs straight to the 

 margin ; abdomen black, 6th segment shining, that and the 2nd seg- 

 ment lengthened as usual, the lateral margin of 2nd segment with a 

 row of short bristles, a broad white hind margin to the 6th segment 

 and very narrow ones to the other segments ; legs yellow, middle and 

 hind femora frequently suffused with brown along their upper margins, 

 hind tibise with four spines, one in the middle of the upper-side, 

 another in that of the under, and two on the outer side, namely, 

 one at the upper third and the other close to the tip. Taken indoors, 

 June and July. 2 mm. — domestica, n. sp. 



46 (45) Thorax yellow or dusky red ; the anterior pair of scutellar bristles much 



smaller than the posterior, scarcely more than coarse hairs. 



o ?. Halteres yellow; meso-pleurae with numerous short bristly 

 hairs and one long and conspicuous bristle ; the two front pairs of legs 

 yellow, the hind pair blackish-brown ; hind tibise with two spines, 

 both on the outer side, one in the upper third, the other near the tip. 



2 — 2f mm. — eryihronota^ Strobl. 



47 (1) Second thick vein not forked. Costa never reaching beyond the middle of 



the wing. In all the species the antei*ior pair of scutellar bristles is 

 much smaller and weaker than the posterior pair, or altogether absent. 



* Phora maculata, Mg. , according to Becker and the specimens in my collection, should be 

 included among the species with two pairs of dorso-centi al bristles, from either of which it can 

 be easily recognised by the characters given above.— J. E.G. 



I 



