58 erotylim:. 



species of Mycotretus are very suggestive of the genera of Dytiscidae after which I have 

 named them. 



A single specimen. 



30. Mycotretus bipunctatus. 



Oblongo-ovatus, luteo-flavus vel obscure castaneus, subtilissime crebre punctatus, protborace punctis duobus 

 discoidalibus, prope basin, antennisque nigris, his articulis duobus primis testaceis. Long. 5-6 millim. 



Hab. Panama, Bugaba (Champion). 



The form of this species is broader and more ovate than that of M. alternans ; the 

 colour is clearer, although varying, two of the specimens being of a pale luteous-yellow, 

 and two others more nearly of a chestnut-red, with the punctures of the striae fuscous, 

 while one is almost intermediate. M. bipunctatus also appears to be allied to 

 M. distigma, Lac, but has no lateral spot upon the elytra. These latter are very 

 smooth and shining, with eight fine punctate striae, and very minute punctures in the 

 interstices. The underside is smooth. The maxillary palpi have their terminal joint 

 securiform, but not lunate or very much widened. The third joint of the antenna? is 

 sometimes partly testaceous. 



Five specimens were captured at Bugaba. 



31. Mycotretus stramineus. 



Oblongus, subparallelus, postice parum attenuates, pallide testaceus, antennis (articulis tribus basalibus exceptis) 

 nigris, tarsis fuscis ; capite protboraceque minutissime punctatis, fere laevibus ; elytris punctato-striatis, 

 punctis fuscis. Long. 6J millim. 



Hob. Panama, Bugaba (Champion). 



An evenly oblong, very slightly ovate species, of nearly uniform testaceous-yellow 

 colour, the thorax faintly clouded, and the punctures on the elytra fuscous, the 

 striae hardly impressed. The underside is smooth; the mentum is sub pentagonal, 

 scarcely angulated. This species is difficult to place : I think its nearest allies will 

 prove to be M. alternans and M. dorso-notatus. There is a slight resemblance between 

 M. stramineus and some species of Brachysphenus (e. g. B. bistripunctatus), but I do not 

 think it can be placed in that genus. The prosternum is hardly compressed ; there 

 are short abdominal lines. Six specimens. 



32. Mycotretus luteolus. 



Oblongo-ovatus, dilute castaneus ; capite prothoraceque crebrius minute punctulatis, elytris leviter punctato- 

 striatis, interstitiis sublaevibus ; corpore subtus fere laevi, metasterno medio minutissime punctulato, 

 episternis vix punctatis; antennis pedibusque nigris, his trochanteribus, illis articulis tribus primis 

 rufis. Long. 6 millim. 



Hab. Panama, Volcan de Chiriqui (Champion). 



Although at first sight this insect appears very similar to M. cruentus or M: lesueuri, 



