794 On Aquatic Carnivorous Cohoptera or DytiscidcB. 



1364. HyJroponis dorsoplagiatus, Faiim., Auu. Soc. Fr. 1880, p. 247. Algeria. 



"Long. 2| ULDi. Oblongus, modice convexus, postice leviter attenuatus, fiiscus, capite, antennis 

 protlioracisque margine latcrali rufo-testaceis, elytris fla-\-ido-testaceis, macula magna transverea, medio 

 sita, postice lougc per suturam prolongata, marginem externum haud attingente, sed postice anguste 

 pvoducta infuscata, pedibus rufesceutibus ; capite convexiusculo, ad oculos impresso ; prothorace brevi, 

 antice leviter angustato, lateribus leviter arcuatis, utrinque striola laterali parallela signato, margine 

 postico medio obtusissirae angulato, antice lineola transversa leviter impresso ; eljtris oblongis, postice a 

 medio attenuatis, apice obtuse acuminatis, lajvigatis, utrinque lineis 2 leviter impressis et tenuiter punc- 

 tulatis, apicem versus obsoletis ; pectore utrinque tenuiter pimctulato ct vage infuscato." 



" Voisin du sexguttatus, mais bien plus gi-and, plus allonge un pen plus parallele vers le milieu ; les 

 ^lytres ne sont pas distinctement ponctuees, leur coloration est diiferente, la grande tache dorsale n'est 

 pas nettement arrctee, ne se prolonge pas autant en avant et ne determine pas de taches jaunes en arriere, 

 leur surface longituclLnale est aussi bien moins convexe." 



13G5. Hyclroporus dubius, Aube, spec. 517. 



" Elongato-ovalis, depressiusculus ; capite testaceo ; thorace ad latera rotundato, testaceo, antice nigro, 

 maculis duabus paulo oblique transversis, confuse nigro-brunneis, notato ; elytris castaneo-bninneis, cum 

 margine exteriore angusto, sex aut septem lineolis plus minusve interi-uptis, confuse testaceo-ferrugineis, 

 apice rotundatini attenuatis; abdomine nigro. Long. 5\ m.m., larg. 2| m.m." 



[.4 description, I.e., follows this diag^iosis]. 



" Je n'ai vu qu'un seul exemplaire de cet Hydroporus ; 11 fait partie de la collection du museum, ou 

 il est indique comme ayant ete pris en Afrique, sans autre indication plus precise." 



Notwithstanding the locality given by Aube, I believe this will prove to be the H. ^dgilans, Woll. (No. 

 465).— D. S. 



13GG. Hydroporus elegantulus. Boh., Ins. Caff. I, p. 249. Cafiraria. 



" Ovalis, modice convexus, nigro-seneus, nitidus ; antennis pedibusque flavo-testaceis ; prothorace 

 crebre, evidenter punctulato, ad basin utrinque oblique canaliculato, margine vittaque media transversa, 

 dorso interrupta, flavo-testaceis ; elytris profundius, seriatim punctatis, interstitiis vage punctulatis, disco 

 uni-cobtatis, margine in£equaliter, fascia transversa intra basin maculaque parva, apicali, flavo-testaceis 

 Long. 2, lat. 1 m.m." 



[This diagnosis is followed, I.e., hy a long descriptiori]. 



The species seems to be a Bidessus, near B. insignis (No. 252). — D. S. 



1367. Hydroporus emilianus, Clk., Ann. Nat. Hist., 1862, p. 183. Mexico. 



" Ovatus, impubescens, punctatus, i-ufo-femigineus ; capite flavo, ad medium fusco-suffuso ; thoracis 

 lateribus flavo-suffusis ; elytris punctatis ; antennis rufo-flavis. Long. corp. ^ lin., lat. f Hn." 



" Ovate, impubescent, tliickly and finely punctate, rufo-ferruginous : head transverse, impunctate, 

 glabrous, in colour flavous, the inner margins of the eyes near the base being suffused with fuscous; 

 thorax transverse, the sides subparallel and constricted in front ; the surface is glabrous and finely 

 punctate, more distinctly near the base ; on either side of the middle, connected with the line of the base, 

 is a short, well-defined, longitudinal fovea : elytra parallel, subattenuate near the apex, thickly but 

 obsoletely punctate ; at the anterior margin (halfway between the humeral angles and the suture) is a 

 short longitudinal fovea, corresponding in position to the thoracic fovea ; the smf'ace in colour is rufo- 

 ferruginous or fuscous, the sides being more or less distinctly suffused with flavous ; abdomen and under- 

 side dark fuscous ; legs flavous ; antennse rufo-flavous." 



This is perhaps a variety of Hydroporus afinis (No. 318). — D. S. 



