446 



FAMILY XI. STAPHYLINILVE. 



S52 (2620). Tachinus ltjridus Erichs., Gen. Spec. Staph., 1840, 920. 



Head black ; legs, sides of thorax, basal two-thirds, sides and tip of 

 elytra dull yellow ; antennae reddish-brown, the four basal joints paler ; un- 

 der surface and abdomen piceous. Head and thorax minutely alutaceous. 

 very finely and indistinctly punctate. Elytra together one-third longer than 

 wide, more distinctly alutaceous, sparsely and finely punctate. Abdomen 

 punctured as elytra, almost smooth beneath. Length 5-5.6 mm. 



Laporte County ; rare. May 7. 



853 (2621). Tachinhs fimbriates Grav., Mon. Col. Micr., 1806, 191. 

 Head and thorax black, shining; elytra pale chestnut brown, tip nar- 

 rowly piceous ; antenna? black, four basal joints and the last one pale ; ab- 

 domen, under surface and legs piceous. Head and thorax finely alutaceous, 

 minutely punctate. Elytra^ together as wide as long, minutely alutaceous, 

 rather coarsely and irregularly punctate, some of the punctures in evident 

 rows. Abdomen shining, sparsely punctulate above, more coarsely beneath. 

 Length 7-9 mm. 



Throughout the State; common. April 11-October 6. Occurs 

 in fleshy fungi. Our largest and broadest species. The first two 

 ventrals of both sexes are carinate between the hind coxaa. 



T. picipes Erichs, uniform piceous, 7-8 mm. in length, occurs 

 from Canada to Virginia ; T. schwarzi Horn, also piceous and 8 mm. 

 in length, has been taken at Detroit and near Cincinnati; T. lim- 

 batus Melsh., 7-7.5 mm. in length, is known from the Middle States 

 and near Cincinnati. 



854 (2626). Tachinus pallipes Grav., Mon. Col. Micr., 1806, 20. 

 Piceous black, shining ; legs, margin of thorax, base and sides of elytra 



and four basal joints of antenme. reddish-yellow. Head and thorax finely 

 alutaceous, minutely and sparsely punctulate. Elytra slightly longer than 

 "wide, finely but distinctly punctured, finely alutaceous. Abdomen more 

 finely punctured than elytra. Length 5-6 mm. 



Throughout the State; common. February 21-October 4. Oc- 

 curs beneath bark and on fungi. Also taken in numbers March 16 

 from beneath a mass of old honeycomb. 



T. circumcinctus Makl., piceous, elytra chestnut brown, length 

 4.5 mm., is a boreal species recorded from Michigan and Kansas; 

 T. nitiduloides Horn, piceous with sides of thorax and tips of elytra 

 paler, length 3 mm., is said to be found from Canada to Maryland, 

 and is reported from Cincinnati by Dury. 



LXIII. Tachyporus Grav. 1806. (Gr., "swift + to walk.") 



Short, broad, convex species having the abdomen abruptly taper- 

 ing and beset with bristly hairs. The males have the front tarsi 

 distinctly dilated, the sixth ventral triangularly notched and the 



