11EMIPTEKA HETEUuLTEEA. 503 



speckles, most of which form a subcostal streak. Length of the body 

 8h — 9h lines. 



The rounded and more porrect horns of the thorax distinguish this 

 species from ]\I. dentalum and from M. quadratum. 



a — c. New Guinea. Presented by W. W. Saunders, Esq. 



Genus 2. THALMA. 



Corpus ellipticum, convexuin, densissime et subtilissime punctatum. 

 Caput mediocre; lobi laterales conligui, extus roiuudati; spiuee dute 

 laterales ante oculos. Rostrum coxas posticas atlingens. Antenna? quadri- 

 articulata?; articuli 2us et 3us dilatati ; 3us 2o valde brevior; 4us fusi- 

 formis, gracilis, 3o brevior. Thorax inermis; latera rotuudata ; margo 

 posticus subrotundatus. Scutellum abdominis dimidio brevius, apice 

 rotundatum. Abdomen apice integrum. Pedes robusli ; tarsi biarticulati. 

 Ala? antics; abdominis apicem attingenles; membrana venis quinque 

 longitudinalibus venulisque paucis transversis. 



Body elliptical, convex, very thickly and minutely punctured. Head 

 not longer than its breadth; lateral lobes contiguous beyond tlie middle 

 lobe, rounded on the outer side and at the lips; a porrect spine on each 

 side in front of the eyes. Eyes not prominent. Rostrum extending to 

 the hind coxa?. Antenna? four-jointed, second and third joints dilated ; 

 third much shorter than the second ; fourth fusiform, slender, shorter than 

 the third. Thorax unarmed; sides rounded; hind angles not prominent; 

 hind border slightly rounded. Scutellum less than half the length of the 

 abdomen, much rounded at the tip. Abdomen with the upper apical 

 membrane entire; two broad rounded lamina? beneath. Legs stout; tarsi 

 two-jointed ; second joint much longer than the first. Fore wings extending 

 to the lip of the abdomen ; membrane with live longitudinal veins and 

 willi a few transverse veins. 



The very different structure of the thorax and the less reticulated 

 membrane of the fore wings distinguishes this genus from Megymenum. 



1. Thalma bigcttata. 



Purpureo*nigra, subtus sordide ochracea ; antenna nigra, artieulo Ao 

 luteo basi nigra ; thoraeis latera subviridia; scutellum guitis duabus 

 luleis, \o basal i, 2o apicali ; abdominis lutera dorsalia luteo niacu- 

 lata; ala: anticcc nigricantes, corio subtus sordide leslacco ; ahc }>us- 

 ticce pur jturao-cy anew. 



Purplish black, dingy ochraceous beneath. Antennae black; fourth 

 joint luleous, black at the base. Thorax with a metallic-green tinge on 

 each side. Scutellum with a luteous dot at the base and another at the 

 tip. Pectus and under side ol abdomen black-punctured, the former with 

 three irregular black stripes, of which there are some traces on the latter. 

 Abdomen above with luleous spots along each side. Legs black. Fore 

 wings blackish ; curium beneath dingy testaceous. Hind wings purplish 

 blue. Length of ihc body 8 lines. 



a. Amboina. Presented bv W. W. Saunders, Esq. 



