672 CATALOGUE OF 



37. HETERACBIS MUNDATA. 



Mas. Testacea, gracilis ; caput et prothorax subtiliter scabra, piceo 

 bimttala ; fastigium subrhomboidale ; antennce graciles^ apice versus 

 nigrce ; prothoracis carina media vix conspicua; proslerni spina 

 gracilis, longiuscula, acuta ; tibiae posticce apices versus patlide 

 virides ; alee anticce paltide cinerece, corpori aquilongce. 



Male. Testaceous, slender. Head and prothorax finely scabrous, 

 with two piceous stripes, which are interrupted by the eyes. "Tip of the 

 vertex flat, somewhat rhomboidal ; keels of the front strongly marked ; 

 inner keels parallel ; outer keels diverging towards the face. Eyes lurid, 

 elliptical. Antennae slender, black towards the tips. Prothorax* with the 

 lateral keels sharply defined; middle keel hardly apparent; transverse 

 impressed lines distinct; fore border straight; sides and hind border 

 slightly rounded. Prosternal spine slender, acute, rather long. Hind 

 femora a little longer than the abdomen; hind tibiae much shorter than the 

 hind femora, pale green towards the tips, their spines with black tips. 

 Fore wings pale cinereous, as long as the body; veins testaceous. Hind 

 wings pellucid ; veins black, pale blue at the base and along the interior 

 border. Length of the body 8^9 lines; expansion of the fore wings 

 20 2i lines. 



Nearly allied to H. tennis, from which it may be distinguished by the 

 blue basal veins of the hind wings. 



a, b. Port Essington. From Mr. Gould's collection. 



Group 2. 



Mas. Corpus gracillimum, fere cylindricum. Caput longum ; fas- 

 tigium planum, fere ellipticum ; frons retracta, quadricarinata. Oculi 

 obliqui, non prominuli. Antennas graciles, capiti et prothoraci ad uninu 

 sequilongEe. Prothorax subtiliter scaber, subtricarinatus ; discus fere 

 planus, margine postico subrotundato. Prosterni spina transversa, 

 incrassata, excavata. Abdomen subcompressum. Pedes graciles ; femora 

 postica abdomini a3quilonga. Ate antica3 angustae, abdomini aequi- 

 Jonga3. 



Male. Body very slender, nearly cylindrical. Head long, smooth ; 

 tip of the vertex depressed, nearly elliptical ; front thinly punctured, some- 

 what retracted, with four slight keels; inner keels parallel; outer keels 

 diverging much towards the face. Eyes elongate-elliptical, oblique, not 

 prominent. Antennae slender, as long as the head and the prothorax 

 together. Prothorax finely scabrous, hardly widened hindward ; disk 

 nearly flat; three slight keels; transverse impressed lines distinct; fore 

 border straight; sides hardly rounded; hind border slightly rounded. 

 Prosternal spine transverse, very thick; its apical part much excavated, 

 notched on the hind side. Abdomen slightly compressed. Legs slender; 

 hind femora as long as the abdomen ; hind tibiae nearly as long as the hind 

 femora. Fore wings narrow, as long as the abdomen. 



