716 On Aquatic Carnivorous Coleoptera or Dytiscide. 
and when this is the case the following jomt or two also show the rudiments of 
similar pubescent bands. 
North America, and Mexico ; (Pennsylvania, Louisiana, Kansas, Georgia, sec. Crotch). 1050. 
1120. Cybister ellipticus, Lec., Trogus ellipticus, M.C_—Oblongo-ovalis, parum 
latus, supra viridi-olivaceus, capite anterius prothoraceque lateribus testaceis, ely tris 
margine laterali testaceo lato, vix ad apicem attenuato ; corpore subtus rufo-piceo, 
antennis pedibusque anterioribus testaceis. Long. 28, lat. 144 m.m. 
This species seems very closely allied to Dytiscus fimbriolatus, and shows in each 
of its sexes almost the same sexual characters as does that species; it is however 
of narrower and more parallel form, and is different in colour, the undersurface 
being more dilute, and the upper surface green, while the yellow band on the elytra 
is very broad and distinct, and is continued at the apex to the suture; at about 
the middle of the wing-case the breadth of the yellow vitta is 2? m.m. being just 
about one-half of the width of the green ground colour, 
North America, (California). 1051. 
1121. Cybister flavocinctus, Aubé, Z'rogus flavocinctus, M.C.—Ovalis, sat latus, 
posterius parum dilatatus, supra olivaceo-niger, capite anterius prothoracisque 
lateribus testaceis, elytris vitta laterali etiam versus apicem argute determinata 
testacea ; corpore subtus piceo, abdominis lateribus flavo-maculatis, antennis pedibus- 
que anterioribus rufis, tarsis intermediis pesoneENe posterioribus piceis. Long, 
29 m.m., lat. 15 m.m. 
This species is excessively close to some of the varieties of Dytiscus fimbriolatus 
(No. 1119); the form however is more parallel in outline, and the yellow band of 
the sides of the elytra is more definite and distinct in its terminal portion, at the 
apex it reaches nearly or quite to the suture being however thinned out to a point 
at its termination. ‘The male characters seem to be almost the same as in Dytiscus 
fimbriolatus, but the sexual distinctions in the female are less, the head behind 
the eyes and the sides of the thorax bear fine scratches, but the elytra appear quite 
smooth, on careful examination however there are found a few very fine short 
scratches placed on the basal portion of the yellow lateral band; the sexual flatten- 
ing and obliquity of the epipleurz is also less than in Dytiscus fimbriolatus. 
Mexico, (Corafalce, Madame Sallé) ; Texas (coll. Castlenau sub nom. C. pilati, Dup.) 1052. 
