11 E MIPTE It A 11 ET E llOl’TE It A . 
503 
speckles, iiiusl 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. denlatum and from M. quadralum. 
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 rolundati; spin® du® 
laterales ante oculos. Kosirum coxas posticas atlingens. Antenn® quadri- 
articulat®; articuli 2us et 3us dilatati; 3us 2o valde brevior; 4us fusi- 
formis, gracilis, 3o brevior. Thorax inermis; latera rotundata; margo 
posticus subrotundatus. Scutellum abdominis dimidio brevius, apice 
rotundatum. Abdomen apice integrum. Pedes robusti ; tarsi biarticulati. 
Al® antic® abdominis apicem altingentes; meinbrana venis quinque 
longitudinalibus venulisque paucis transversis. 
Body elliptical, convex, very thickly and minutely punctured. Head 
not longer than its breadth; lateral lobes conliguous beyond the middle 
lobe, rounded on tbe 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®. Antenn® 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 lamin® beneath. Legs stout; tarsi 
two-jointed ; second joint much longer than the first. Fore wings extending 
to the lip 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 biguttata. 
Purpiireo-nigra, sublus sordide ochracea ; anlenruB nigrce, ariiculo 4o 
luleo basi nigro ; thoracis latera subviridia ; scutellum guttis duabus 
luleis, lo basali, 2o apicali ; abdominis latera dorsalia luteo macu- 
lata ; alee anticce nigricantes, corio subtus sordide testaceo ; alee pos- 
ticce purpureo-cyaneee. 
Purplish black, dingy ochraceous beneath. Antenn® black; fourth 
joint luteous, black al 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. Picscnlcd by W. W. Saunders, Esq. 
