ENTOMOLOGICAL SECTION. Xlll 



.Tanson of London, through whose kindness I was eniblel to study 

 and make a sketch of it. 



While on a visit to London during 18(5!) — 70, Dr. Leconte saw 

 and named specimens in the cabinet of the IJritish Museum which 

 appear to have been males. 



In the Ent. Mo. Mag. xiii, Nov. 1876, p. 121, Mr. C. 0. Water- 

 house publishes a note on Hemipeplus, and describes what he believes 

 to be the true //. niarginipennis Dej., with the following remarks: 



" My object in describing this is, that I believe it to be quite distinct from 

 the species described under the same name by Dr. Leconte, which he says is 

 two-tenths of an inch in length, and of which there are specimens named by 

 Dr. Leconte in the British Museum (from Florida) which only measure two- 

 twelfths of an inch. The small specimens difF.^r from the large one above 

 described, in having the eyes less prominent; the head not immediately nar- 

 rowed behind the eyes, but having, as it were, rectangular clieeks, the sides of 

 the elytra less suddenly deflexed, and the deflexed portion not bounded above 

 by a fine carina." 



The following is the description by Mr. Waterhouse and for com- 

 parison 1 reproduce that by Dr. Leconte. 



Hemipeplus [Nemicelus) marginipennis Dej. — " Valde elongatus et depressus, 

 parallelus, testaceus, nitidus; capite cum oculis thorace paulo latiori, pone 

 oculos subito angustato; thorace latitudine i lougiori, lateribus antice rotun- 

 datis, postiee subsinuatis, pone medium angustato, fovea utrinque prope basin 

 impresso; elytris punctulatis, margine laterali iufuscato. Long. 3 lin. ; 5 mm." 

 (Waterhouse). 



"Nemicelus marginipennis, linearis, valde elongatus et depressus, pallide 

 testaceus nitidus, capite cum oculis magnis thorace laiiore, hoc latitudine fere 

 duplo longiore, lateribus antice rotundatis, postiee subsinuatis, pone medium 

 angustato, fovea utrinque prope basin profunda impresso, elytris punctulatis 

 vix striatis, margine laterali nigricante, apice truncatis. Long. 20; /ram." f 

 (Leconte). 



I think it would be difficult to find two descriptions corresponding 

 more closely when made by different persons at such an interval of time. 



Before proceeding further the differences between the sexes will 



be given. 



Male. — Smaller than the female, more opaque, more densely and finely 

 punctulate. Head with hind angles distinctly prolonged behind the eyes, the 

 latter being smaller than in the female but variable in size. First joint of 

 antennae oval, suddenly narrowed at base, not longer than the next two joints 

 taken together. Thorax not longer than wide, apex very feebly emarginate, 

 basal fovea deep but not elongate, a vague but entire median channel. Elytra 

 vaguely substriate at base, disc convex, the declivity at the sides not limited 

 by an acute ridge, apices obliquely prolonged and at tip conjointly rounded. 

 Last ventral segment scarcely longer than the preceding and regularly oval at 

 tip. Last dorsal segment very slightly ex]>osed beyond the elytra. 



