310 



FAMILY X. PSELAPHIDJE. 



IV. Tmesiphorus Lec. 1849. (Gr., "a fissure + to ■ carry.") 



Antennae clavate ; frontal tubercles longer than wide : fourth 

 joint of maxillary palpi triangular and emarginate; head and tho- 

 rax with a network of large rounded punctures. Two species are 

 known. 



592 (1869) . Tmesiphorus costalis Lee. Bost. Joiirn. Nat. Hist. VI. 1S49. 77. 



Elongate-oval. Piceous. shining, clothed with short, fine, appressed yel- 

 lowish hairs. Head two-thirds as long as broad: frontal fissure deep, 

 branching behind the frontal tubercles towards the fovea on vertex; eyes 

 prominent. Antenna? of male more than half the length of body, second 

 joint cylindrical, one-third as long and two-thirds as wide as first ; third to 

 seventh globular, eighth to tenth gradually larger, obconical. eleventh as 

 long as ninth and tenth together, notched on one side near base : female an- 

 tennae shorter, less robust and without notch on last joint. Thorax bell- 

 shaped, with an obtuse tubercle each side near middle, disk with two fovea? 

 on apical third and a larger one each side near base. Elytra each with a 

 broad, flat-bottomed groove on basal half, convex behind: humeri high. 



Fig. 148. a, Cedius spinosus; b, Cedius ziegteri; c. Tmesiphorus carinatus; d, Pilopius lacustris. All highly 

 magnified. (After Brendel and Wickham.) 



prominent. Abdomen broadly margined, first and second dorsal segments 

 carinate on the sides. Length 3.3 mm. (Fig. 147, 6.) 



Throughout the State ; common. March 31-December 29. Oc- 

 curs beneath stones and bark and in ants' nests. Gregarious in 

 winter beneath half-buried logs in upland woods. 



593 (1870). Tmesiphorus cabinatus Say. Journ. Phil. Acad. Nat. ScL, IT. 

 1824. 97 ; ibid. II. 235. 

 Pale reddish-brown, densely punctate ; pubescence short, appressed. Ver- 

 tex with median frontal groove broader and not connected by branches with 

 the fovea. Front fovea of thorax wanting. Abdomen with a median carina, 

 as well as one each side on the second and third dorsal segments. Other- 

 wise as in costalis. Length 2.5 mm. (Fig. 14S. c.) 



Crawford County; rare. August 13. 



