NEMATOCERA. 87 



tentacles more dusky, 2-jointed ; second joint smaller, orbiculate ; 

 beneath them a compressed obtuse process nearly as long ; forceps 

 of (J unguiculate. Found on short grass at Holywood, etc. 

 (Haliday) ; length $ f lin., ? ;} lin. PI. ii. (3). 



Sub-Genus. — Catocha, Hal. 



C. latipes, Hal. = Alacrosiyla latipes, Wtz. 



Black, head small, round ; eyes lunate ; ocelli three, unequal ; 

 abdomen eight segments ; dirty brownish-yellow, with dark incisions ; 

 antennae in (^ i6-jointed ; lo-jointed in ?, shorter than in (^, joints 

 oval, except three and ten, which are elongated ; antennae brown, 

 dark brown at the base ; thorax shining, oval, convex ; scutellum 

 large, semilunate ; wings broad, obtuse, pubescent, broad fringe on 

 posterior border. The first longitudinal vein ends at about half- 

 length of wing, second longitudinal ending hardly in front of tip of 

 wing ; cross vein small ; third longitudinal forked ; fourth and fifth 

 simple ending at the border ; halteres brown ; legs brownish-yellow ; 

 last two or three tarsal joints dilated, one pulvillus (Fig. 6). When 

 alive the imago is metallic- blue, with brick-red appearance under the 

 wings. This colouring soon fades in death. Bergenstamm says 

 " Lebensweise unbekannt." PI. i. (5). 



Sub-Genus. — Lcstremia. 



This sub-genus is interesting as connecting the Cecidomyidse with 

 the Mycetophilidfe. The veins of the wing resemble Sciara, while 

 the antennae and legs are truly Cecid in character. PI. i. (7). 



i Sciara leiicopJiaa, Mg. 



L. ieucop/uea, Mg. 



Tipiila juniperina, Fab. 

 ChifOHflJuusjiiJiiperina, Fab. 

 L. cinerea^ Macq. 



This species is found in larch groves ; the habits are unknown. 

 Antennae of cf 15-16-jointed. Scutum brown above, yellow at sides. 

 Abdomen dirty brownish-yellow. Legs pale yellow ; tarsi dark. 

 Antennae brownish ; long petioles. Wings transparent ; small hairs, 

 with brown veins. First and second longitudinal veins parallel and 

 near each other ; second longitudinal ending far from the extremity 

 of wing ; fork of fourth longitudinal vein very long ; that of third 

 longitudinal still longer ; upper tooth straight ; under tooth bending 

 towards posterior edge. 



