DESCRIPTIONS OF NEW SrECIES. 89 



One male from Texas, in Mr. Tike's collection. The sculpture 

 of the thorax is peculiar; it is distinctly and tolerably del 

 punctured at the sides and before the middle, with a rerj finely 

 punctulate broad transverse space extending from the middle to 

 the base, and from the dorsal carina to the depressed Bides. 



The genus Pleotomus was established by me upon this insect, 

 (Class. Col. N.America, 184,) without giving a specific description. 

 It is easily distinguished from other genera of Lampyrini by the 

 antennae being 14-jointcd, about two-thirds the length of the thorax, 

 with the 1st joint short, obconical ; the 2d scarcely risible; the 3d 

 to the 13th prolonged externally and internally, so that the an- 

 tennae become bipectinate ; the 14th longer than the proct 

 of the preceding joint. The maxillary palpi are dilated, with 

 the last joint securiform; the labial with the last joint elongated, 

 oval, somewhat pointed. The eyes are very large, and very 

 nearly approximated on the under surface of the head, behind the 

 mouth. The 7 th ventral segment is broadly truncate, or Bub- 

 emarginate, permitting the small conical 8th joint to become 

 visible. The luminous segments (if any) are not distinguishable, 

 owing perhaps to the general pale color of the insect. The 

 pygidium is semicircular. The last joint of the tarsi is longer 

 than the preceding. 



This genus seems allied to Lamprocera Lap., but differs by 

 the greater number of the joints of the antennae, and the greater 

 length of the last joint of the tarsi. 



IHICROPHOT17S Lec. 



Antenna short and stout, scarcely longer than the head, 2d joint nearly 

 equal to the 1st, about as long as wide ; 3d joint very little longer, nar- 

 rower at the base; 4th-9th gradually diminishing in length; 10th oval, 

 not longer than the preceding ; 11th very small, cylindrical, truncate and 

 subulate, as in Phausis. Eyes immensely large, almost contignous ; max- 

 illary palpi with the joints broader than long, last one triangular, nearly 

 acute. Prothorax semicircular, convex at the middle, widely flattened 

 and impressed each side ; finely scabrous, without hyaline spots. Elytra 

 suddenly widened behind the base, rounded at the sides and OOnoaTa 

 beneath the humeral elevation, gradually narrowed from the middle, trpfl 

 rounded and slightly dehiscent. Abdomen with the last ventral segment 

 prolonged at the middle and rounded at the tip in all the Bpedmena 1 have 

 seen ; last dorsal segment subtruncate. Wings perfect. Peel feeble, com- 

 pressed ; first and second joints of tarsi Bomewhal longer j -4th Joint short, 

 scarcely lobed; 5th joint slender, as long as the two preceding united. 



