38. 

 HEDYCHRUM ARDENS. 



Order Hymenoptera. Tarn. Chrysididse Lat., Leach. 



Type of the Genus C. violaceum Rossi. 



Hedychrum Lat., Leach. Chrysis Limi., Fab., Jurine. 



Antennee inserted close to the margin of the clypeus, genicnlated, 

 fusiform, 13-jointed; first joint the longest. (1.) 

 Labrum very minute, long, attenuated, ciliated. (2.) 

 Mandibles hairy, externally arcuated, with 3 sharp teeth towards 

 the apex. (3.) 



Maxillce horny at the base, membranaceous towards the apex, 

 ovate, entire, ciliated : Palpi 5 -jointed, longer than the maxillse, 

 third joint rather thicker, fourth and fifth rather longer than the 

 others. (4.) 



Mentum long, dilated anteriorly : Talpi short, 3 -jointed : Lip 

 with the margins conniving externally. (5.) 

 Clypeus icith a deep impression bettoeen the eyes, receiving the first joint 

 of the antennae. Thorax semi-cylindric, angular, divided by 3 trans- 

 verse sutures. Metathorax not elongated into a scutellum. Body 

 contractile into a ball. Abdomen attached only by a portion of its 

 transverse diameter, semicircular, with the extremity rounded, convex 

 above, concave beneath, composed of three joints, the second very large. 

 Tarsi ^-jointed. (8.) Superior wings with the marginal cell scarcely 

 complete at the apex ; discoidal cells very obscure. Inferior wings 

 without distinct nerves. 



Ardens Lat. Coq. Illns. Icon. Ins. dec. 2. p. 59. t. 14./. 7. 



Shining, pubescent. Head and thorax deeply, abdomen minutely 

 punctured. Green, centre of head, thorax and abdomen, crimson 

 reflecting purple and gold. Posterior angles of thorax blue. 

 Under side of abdomen black, sometimes aureous towards the 

 base. Wings fuscous, with alternate bands of gi-een and gold at 

 the posterior margin. Antennae black, green at the base. Legs 

 Si'een. Tarsi rufous. 



a* 



In tJie Cabinets of the British Museum and the Author. 



In a former number (folio 8.) was given the Genus Chrysis ; and 

 another group of the same family, separated by Latreille, is the 

 subject of the present paper. Although the Hedychri may equal 

 the Chrysiflce in splendour, their form is by no means so elegant ; 

 the obtuseness and breadth of the abdomen distinguishing 



