On Two new Cyprinodonl Fishes. Q)^ 



each lateral margin ochraccous ; j)ronotiiin ocliraceous, 

 anterior and posterior margins palely ochraccons, a broad 

 central longitudinal fascia and the fissnres black ; mcsc- 

 notnm black, Avith two central longitndinal fasciec — narrowed 

 anteriorly, medially inwardly widened and posteriorly in- 

 wardly excavated — and a spot on each side of basal cruciform 

 elevation ocliraceous; abdomen above black, the tympanal 

 cavities and posterior segmental margins ocliraceous ; body 

 beneath and legs black ; lateral njargins and a central 

 anterior longitudinal fascia to face, coxal streaks, a[)ices of 

 femora and streaks to same, tibijc — excluding spots and 

 a[)ices — ocliraceous ; opercula, lateral and posterior seg- 

 mental margins to abdomen beneath, grcyish-ocliraceous, 

 the lateral margins with dark spots ; tegmina hyaline, vena- 

 tion black, costal membrane and upper vein to cluval area 

 greyish, postcostal area iufuscated ; wings hyaline, basal 

 venation greyish, outer venation pale ochraccons : vertex, 

 prominently sulcate between the ocelli ; pronotum about as 

 long as head ; face finely, narrowly sulcate for about half 

 its length ; rostrum reaching the intermediate eoxse ; oper- 

 cula in ^ small, directed inwardly but with their apices 

 well separated, not passing base of ahdomen, their bases 

 black: abdomen beneath with its lateral margins laminately 

 rcHcxed ; tegmina about two and a half times as long as 

 broad ; wings with five apical areas. 



Long. excl. tegm., S , lOi mm. ; exp. tegm. 2G mm. 



Hub. N.W.Australia; Cue {H. IV. Brown, Brit, and Sydney 

 Muss.). 



Allied to P. stigmatica, Dist. 



X. — Descriptions of Two neio Cyprinodont Fishes from 

 Mexico, pn-esented to the British Museum hy Ilerr A. 

 Uachoio. By C. Tate Kegax, M.A. 



(Published by permisiiion of the Trustees of the British Museum.) 



Hetehophallus, gen. nov. 



Closely related to Gamhusia, differing only in the some- 

 wliat different structure of the intromittent organ. The first 

 ).rolonged ray is siiorter th;in the second and thirl, and its 

 distal segments have not the characteristic Gambusli struc- 

 ture, but are formed as in Behntsox; the hooks or spines at 



Ann. (f; Ma<j. N. Hint. S'.r. 8. Vol. xiv. 5 



