Zoological Society. 141 



total want of sculpturing, if we except some longitudinal furrows 

 on the under side of the prothorax at the sides. 



The exact habitat of the specimen from which the above descrip- 

 tion is taken is not known, but in Mr. Darwin's collection is a spe- 

 cimen which I am inclined to regard as specifically identical, and 

 which is from St. Julian. It has the elytra proportionately rather 

 broader and the thorax narrower, and the short longitudinal furrows 

 on the hinder margin of the thorax are distinct ; the sutural portion 

 of the elytra is less depressed. 



Nyctelia Guerinii. Nyct. atra, nitida, ovata ; capite transversim 

 impresso ; thorace subquadrato in medio paulb dilatato, antice 

 emarginato, postice fere recto ; ad marginem later alem sulcis mi- 

 nutis valde obliquis insculpto ; elytris ovatis, convexis, ad apicem 

 paulb productis, ad latera rugis transversis in seriebus tribus 

 dispositis. 



Long. corp. 9^ lin. ; lat. 5| lin. 



Hab. St. Cruz. 



Rather smaller than N.leevis. Head with small punctures very 

 thinly scattered over the upper surface, and with a transverse im- 

 pression rather in front of the line of the eyes. Thorax subqua- 

 drate, the breadth not quite equal to twice the length ; the emar- 

 ginated portion in front in the form of a segment of a circle ; the 

 hinder margin nearly straight ; the posterior angles scarcely pro- 

 duced, and forming nearly right angles ; the anterior angles acute. 

 The thorax is contracted in front, broadest in the middle, and the 

 lateral margin from the middle to the posterior angles forms nearly 

 a straight line : on the hinder part of the upper surface are some 

 extremely minute punctures, and at the sides are some small ob- 

 lique grooves. The elytra are ovate and moderately convex, and 

 the apical portion is but little produced ; the region of the suture 

 is very slightly indented: the sides of the elytra are covered with 

 transverse grooves having narrow convex interspaces ; these grooves 

 extend inwards to about the middle of each elytron, and are arranged 

 in three series, being divided by two longitudinal lines ; the innermost 

 series is indistinct : the lateral keel is distinctly crenulated. The 

 mentum is distinctly punctured ; the prosternum, as well as the other 

 thoracic segments, and the abdominal segments, have the usual 

 sculpturing, but it is less strong than usual. 



It is with some hesitation that I name this insect, since it ap- 

 proaches very near to the N. Newportii ; it differs, however, in ha- 

 ving the thorax smaller and proportionately narrower, the elytra less 

 convex, and furnished at the sides with three rows of transverse 

 impressions instead of one; the region of the suture is less depressed. 



Nycteua sulcicollis. Nyct. ovata, atra ; thorace transverso, ad 

 latera rotundato, antice angustiore, sulcis minutis longitudinaliter 

 impresso; elytris crebre punctatis (punctis confluentibus) , tuber - 

 culisque minutis instructis : capite, thorace elytrorumque lateribus 

 pilis vestitis, pedibusque etiam pilis instructis. 



Long. corp. 8J lin. ; lat. 5J lin. 



Hab. St. Cruz. 



