ACH1D1D.E. 509 



17. OPOMALA VITTATA. 



Mas. Nigra, gracilis ; caput et prothorax subrvgulosa, luteis quinque 

 vlttata ; caput antice conicum, f rente luteo trivitlata ; oculi testacei, 

 elliptici, obligui, prominuli, rufescente lineati, supra fere con tig ui ; 

 antenna lanceolatce, subdilalatce, protkorace duplo longiores ; pro- 

 thoracis margines anticus et posticus rotundati ; pectus luteo trifascia- 

 tum; abdomen livido trivittatum ; femora luteo vitlata; tibia 

 quatuor anteriores subtus lividee ; alee anticce luteo bivit tales ; alee 

 posticce diaphance, cceruleo venosce, apices versus nigricantes. 



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

 slightly 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 antennae; front with three 

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

 meeting above, 'with some reddish lines. Palpi dull luteous. Antenna? 

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

 together. Prothorax with three transverse impressed lines; fore border 

 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 ; 

 hind femora incrassated at the tips; four anterior tibia? livid beneath ; hind 

 tibiae shorter than the hind femora, wilh 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 with black 

 veins towards the tips, 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 FEMOHALIS. 



Foem. Testacea, gracilis, subtililer punctata ; caput et prothorax nigro 

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

 conicurn, fronte quadricarinata aspere punctata disco nigro; oculi 

 fulvi, elliptici, obligui, prominuli, supra approximati; antenna 

 fulvce, non dilalatce, prothorace duplo longiores ; prothoracis margines 

 anticus et posticus subrotundali ; prosternum unispinosum; abdominis 

 dorsurn nigricans, lestaceo maculariter biviltatum ; femora quatuor 

 anteriora nigro univittata, femora postica ochracea apice nigrirantia ; 

 tibiae posticce viridcs ; alts anticce fuscce, costa nigricante ; alee posticce 

 diaphance, apice nigricantes. 



Female. Testaceous. Head and proihorax 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 

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

 Eyes tawny, elliptical, oblique, prominent, approximate above. Antenna? 

 tawny, 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. 



