90. 

 CHIRONOMUS iESTIVUS. 



Order Diptera. Fam. Tipulidae Lat., Leach. 



Type of the Genus Tipula plumosa Linn. 

 Chironomus Meig., Lat., Fab., Panz. Tipula Linn., Fab., 8fc. 



Antenna; approximating, arising from the crown of the head. 

 Male plumose, 13-jointed, basal joint large globular, 2nd small, 

 1 following very minute, transverse, terminal joint very long, 

 nearly filiform (fig. 3). Female shorter, 7-jointed, basal joint 

 large, somewhat globose, 2nd small, 4 following ovate, elongate, 

 increasing in length from the 1 st^ with a few long bristles, ter- 

 minal joint long, attenuated, pilose (3 a). 

 Labrum and tongue horny, short, acute (2* b). 

 Lip small, bilobed, membranaceous, hairy (g). 

 Palpi 2, exserted, incurved, cylindric, pilose, 4-jointed, basal 

 joint small, the following long, of equal length (f). 

 Head small, transverse. Clypeus large, semiorbicular. Eyes kidney- 

 shaped, approximating behind. Ocelli none. Thorax gibbose, rounded 

 behind. Scutellum formed apparently of 2 plates, one lying over 

 the other. Abdomen of viales linear, slender ,• of females robust. 

 Wings 7iot longer than the body, lanceolate, defiexed, transparent, 

 sometimes hairy, interior margin ciliated (9). Halteres short, naked. 

 Legs, anterior the longest, and distant from the others. Tarsi 

 5 -jointed. Claws and Pulvilli distinct. 



iEsTivus Nob. 



Female pale sulphur colour, very hairy. Eyes black. Thorax 

 very globose, projecting over the head like a hood (fig. A), with 

 2 abbreviated stripes down the centre and the sides towards the 

 base ferruginous, 10 long and round black spots forming an 

 interrupted line round the thorax, and 3 others very minute 

 at the base of the wings. Abdomen robust, ferruginous at the 

 base, ochraceous towards the apex, reticulated with black down 

 the back. Wings hairy, iridescent, stained ochraceous, deepest 

 towards the costa, with a fuscous spot near the interior angle, 

 and 2 paler spots towards the posterior margin. Thighs and ti- 

 biae very robust, ochraceous, the latter fuscous at their extremi- 

 ties. Tarsi with the 4 first joints fuscous at their apex, terminal 

 joint and claws nearly black. 



In the Cabinet of Mr. Bentley. 



