A(;iiiDiD.E. 509 



17. Opomala vittata. 



Mas. Nigra, gracilis; caput et prothorax suhrvgidosa, lutein quinque 

 vittata ,• caput antice aiuicum,fionte lulto trivittata ; oculi testacei, 

 elliptici, obliqui, prominnli, rufescente lineati, supra fere contigui ; 

 antenna lanceolatce, subdilalaliC, prothorace dvplo bmgiores ; pro- 

 ihoracis margines anticus et posticus rotundati ; pectus luten trifascia- 

 ium; abdomen iivido trivittatum; femora luleo vittata; tihice 

 qualuor anieriores sublus lividce ; alee aniica luteo bivitlatce ; alee 

 posticce diaphance, cceruleo venosa, apices versus nigricantes. 



Male. Black, slender, nearly cylindrical. Head and prolhorax 

 slifjhlly rugulose, with five luteous stripes, of which the inner pair are 

 united between the eyes, and the middle one is very slender. Head much 

 shorter than the prothorax, conical between the antennEe; front with three 

 luteous stripes. Eyes testaceous, elliptical, oblique, prominent, nearly 

 meeting above, with some reddish lines. Palpi dull luteous. Aniennie 

 lanceolate, slightly dilated, much longer than the head and the prothorax 

 together. Prothorax with three transverse impressed lines; fore bonier 

 and hind border rounded. Pectus with three irregular luteous bands. 

 Abdomen with three livid stripes, of which the middle one is very broad. 

 Legs short, stout; femora with luteous stripes; fore femora green beneath ; 

 bind femora incrassated at the tips; four anterior tibite livid beneath ; hind 

 tibicB shorter than the hind femora, with two rows of stout spines. Fore 

 wings narrow, with two luteous stripes, which extend from the base to the 

 middle. Hind wings pellucid, with blue veins, blackish and wiili black 

 veins towards the lips, much shorter than the fore wings. Length of the 

 body 12 lines; expansion of the fore wings 22 lines. 



a. Amazon Region. From Mr. Wallace's collection. 



18. Opomala iemokalis. 



Ftem. Testacea, gracilis, subliliter punctata ; caput el prothorax nigro 

 quadrivittata, luteo bivittata ; caput prothorace brevius, antice longi- 

 conicuin, fronte quadricarinata aspere punctata disco nigro ; octdi 

 fulvi, elliptici, obliqui, prominuli, supra approximati ; antennce 

 fulvce, non dilatata, i>rothorace duplo longiores ; prothoracis margines 

 anticus et posticus subrotundati ; prosternum unispinosum; abdominis 

 dorsum nigricans, testaceo maculariter bivitlatum ; femora qualuor 

 anteriora nigro univitlata , femora postica ochracea apice nigricantia ; 

 tibia postica virides ; alee anticee fuscce, cosla nigricante ; alee poslicee 

 diaphanee, apice nigricantes. 



Female. Testaceous. Head and prolhorax with four black stripes and 

 with two exterior broader and more determinate luteous stripes. Head 

 much shorter than the prothorax, forming an elongated cone between the 

 antennae; front roughly punctured, with a black disk and with four keels. 

 Eyes tawny, elliptical, oblique, prominent, approximate above. Antennae 

 lawny, lanceolate, not dilated, very much longer than the head and the 

 prothorax together. Prothorax with three transverse impressed lines; fore 

 border and hind border slightly rounded. Prosternum with an acute spine. 



