HEMIPLPERA HETEROPTERA. 503 
speckles, most of which form a subcostal streak. Length of the body 
8} —9} lines. 
The rounded and more porrect horns of the thorax distinguish this 
species from M. dentatum and from M. quadratum. 
a—c. New Guinea. Presented by W. W. Saunders, Esq. 
Genus 2. THALMA. 
Corpus ellipticum, convexum, densissime et subtilissime punctatum. 
Caput mediocre; lobi laterales contigui, extus rotundati; spine duw 
laterales ante oculos. Rostrum coxas posticas attingens. Antenne quadri- 
arliculate; articuli 2us et Sus dilatati; 3us 20 valde brevior; 4us fusi- 
formis, gracilis, 30 brevior. Thotax inermis; latera rotundata; margo 
posticus subrotundatus. Scutellum abdominis dimidio brevius, apice 
rotundatum. Abdomen apice integrum. Pedes robusti; tarsi biarticulati. 
Ale antice abdominis apicem attingentes; 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 the middle 
lobe, rounded on the outer side and at the tips; a porrect spine on each 
side in front of the eyes. Eyes not prominent. Rostrum extending to 
the hind cox. Antenne 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 Jess than half the length of the 
abdomen, much rounded at the tip. Abdomen with the upper apical 
meinbrane entire; two broad rounded lamin beneath. Legs stout; tarsi 
two-jointed ; second joint much longer than the first. Fore wings extending 
to the tip of the abdomen; membrane with five longitudinal veins and 
with 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 BIGUITATA. 
Purpureo-nigra, sublus sordide ochracea; antenneé nigra, articulo 4o 
luteo bast nigro ; thoracis latera subviridia; scutellum guttis duabus 
luteis, 10 basali, 20 apicali; abdominis latera dorsalia luteo macu- 
lata; ale antice nigricantes, corio subtus sordide testaceo ; ale pos- 
lice purpureo-cyanee. 
Purplish black, dingy ochraceous beneath. Antenne black; fourth 
joint luteous, 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 of abdomen black-punctured, the former with 
three irregular black stripes, of which there are some traces on the latter. 
Abdomen above with luteous spots along each side. Legs black. Fore 
wings blackish ; corium beneath dingy testaceous. Hind wings purplish 
blue. Length of the body 8 lines. 
a. Amboina, Presented by W. W. Saunders, Esq. 
