y ^ V ^ 3 ? 



768. 

 HYDROTyEA CILIATA. 



Order Diptera. Fam. Muscidas. Anthomyzidae Lat, 

 Type of the Genus, Musca meteorica Linn. 



Hydrot^a Desv., Macq., Meig., Curt. — Anthomyia Meig. — Musca 

 Linn., Fall. 



Antennce inserted in a cavity in the middle of the face, approxi- 

 mating, short, drooping and 5-jointed, basal joint short, 2nd 

 stout, obtrigonate, with strong bristles above, 3rd large, elliptic, 

 compressed, velvety, 4th small, oblong, inserted at the base of 

 the 3rd ; 5th a moderate pubescent seta, thickened at base (3). 

 Luhrum longish, attenuated, pointed (\b). 

 Tongue undiscovered. Mandibles and Maxillce none. Palpi very 

 long, clavate and bristly (/). 



Lip large, stout, terminated by 2 very large pilose lobes {g) . 

 Head transverse ; face orbicular ; hypostoma concave, bristly and 

 hairy beneath (2) ; eyes large and oval, approximating and pubescent 

 in the male, remote and sometimes naked in the female (2 $ ) .• ocelli 

 Z, forming a triangle on the crown, which is bristly. Thorax sub- 

 quadrate-ovate, with long bristles : scutel subtrigonate, with 2 long 

 bristles at the apex. Abdomen not broader or larger than the thorax, 

 bristly, with 4 distinct joints, oval in the male, apex conical in the 

 female. Wings longer than the body, divaricating or incumbent, 

 4th and 5th longitudinal nervures slightly conniving at the apex, ap- 

 proximating at the centre, where they are united by a transverse 

 nervure, 5th and 6th united by a long oblique nervure ; costa bristly 

 at the base ; squamulse moderate and semiovate : halteres small and 

 capitate. Legs long, intermediate the longest : thighs, anterior with 

 1 or 2 strong teeth beneath in the males, intermediate long and 

 linear, with 2 or 3 long bristles at the apex ; hinder stouter, with a 

 strong spine beneath : tibiae, anterior sinuated internally above, icith 

 a bristle near the apex, the others with a few bristles outside and at 

 the apex, hinder ciliated internally, except at the base : tarsi long, 

 very pubescent beneath, basal joint long : claws hooked ; pulvilli 

 large and bilobed. Obs. The dissections were from H. ciliata $ . 



CiLiATA Fab.— Curt. Guide, Gen. 1287. 134. 



Blue-black, hairy and bristly : eyes brown or reddish ; hypo- 

 stoma and cavity between the antennae silvery white ; a silvery 

 stripe on eacli shoulder, and a narrow obscure one at the centre 

 of the anterior margin of the thorax ; base of 2nd, 3rd and 4th 

 abdominal segments in the male, with glittering silvery- gray 

 fasciae, interrupted down the back ; apical segment alone of that 

 hue in the female ; nervures brown, ochreous at the base ; hal- 

 teres subochreous ; anterior thighs of male with a large tubercle 

 beneath, and a hook nearer tlie apex, with a pencil of short 

 bristles ; intermediate with a pencil of erect long bristles at the 

 apex ; hinder with a long erect slender spine at the centre be- 

 neath ; anterior tibiae sinuated internally towards the base ; 

 hinder ciliated internally, except at the base, the hairs shortest 

 at the apex ; legs simple in the female. 



In the Cabinets of Mr. W. Clifton, the Author, SiC. 

 745. 



