412 REVISION OF THE ELATERID.E 



punctatis, striis punctatis, luteo-flavis, liumcro dimidioque postico fuscis, pedibus antenuisque rufis, 

 his articulo 3'° sequente paulo longiore; fcmoribus infuscatis. Long. - 21 — - 3. 



Le Conte, Proc. Acad. Nat. Sc. 6, 4G. 



Melasis rujicornis Say, Journ. Acad. Nat. Sc. 3, 1G6. 



Eucnemis [Nematodes) rujicornis Say, Trans. Am. Phil. Soc. 6, 187. 



Missouri, near Booneville. One specimen has the elytra entirely yellow. The antennae 

 of the male are strongly flabellate from the fourth joint: the apex of the abdomen of both 

 sexes has three small prominences beneath, of which the middle one is crest-like, and the 

 lateral ones tuberculiform. This species differs from the next by the less elongated third 

 joint of the antennas. 



2. T. obliquus, niger, tenuiter pubescens, capite thoracequc scabro-punctatis, hoc quadrato, 

 lateribus ad apicem paulo rotundatis, angulis posticis acutis, linea dorsali pone medium acute impres- 

 sa: elytris scabris, striis punctatis, sutura usque ad medium late luteo-testacea, pedibus antenuisque 

 rufo-testaceis, his articulo 3 io scquentibus duobus sequali, femoribus infuscatis. Long. '23 — ■'■'•'2. 



Le Conte, Proc. Acad. Nat. Sc. G, 4G. 



Euenemis obliquus Say, Trans. Am. Phil. Soc. 6, 187. 



Ohio, New York, New Hampshire. In six specimens, I can discover no sexual differ- 

 ences: the fourth joint of the antennae is a little less dilated in one than in the other five: 

 the antenna) after the fourth joint are strongly serrate, almost pectinate, the joints gradu- 

 ally becoming more transverse: the third joint is slender, and as long as the fourth and 

 fifth together. The apex of the abdomen, as in the preceding species, has three small 

 elevations. 



Div.2. EUCNEMIDES. 



This division is sufficiently characterized by having the front slightly and uniformly 

 convex, the antenna?, moderately approximated, inserted in a deep sinus, with the clypcus 

 expanding anteriorly: the labrum appears merely as an indistinct margin to the clypcus: 

 the presternum is truncate anteriorly: the lobe seen in Elaterides is represented by a 

 margin separated by an impressed transverse line: the lateral suture is nearly always 

 straight, in Anelastes alone, a little curved, and meets the lateral margin of the thorax at 

 the anterior angle: the posterior spine is short and usually truncate, somewhat as in Car- 

 diophorus: the anterior part of the sides of the prothorax reaches the eyes, which are 

 thus partially concealed. The coxal plates are always distinct, frequently very broad: 

 the first joint of the antennae is always long; the last joint of the maxillary palpi always 

 dilated, and usually large: the ungues cither entire, or with a single tooth at the middle. 



I have removed from this division Melasis and Tharops, for reasons before given, and, 

 therefore, modify the synoptic table of genera given by me in the Proceedings of the Aca- 

 demy of Natural Sciences, vol. 6, p. If), to suit this change of classification. 



A. Thorax subtus non sulcatus : 



Coxae posticre laminis angustia; 



int us quadrangulariter paulo dilatatis; - Anelastes. 



intus non dilatatis - - Hylochares. 



