48 PROCEEDINGS OF THE NATIONAL MUSEUM vol.84 



and irregular humeral band ; pronotum generally vaguely clouded at 

 middle. Third segment of maxillary palpus feebly expanded, fourth 

 acicular. Antennal segments all longer than broad; eleventh one- 

 half longer than tenth. Pronotum with sides nearly straight in 

 apical half; not wider than elytra. Elytra finely irregularly punc- 

 tate, the pmictures submuricate, though indistinct; sometimes with 

 two or three sutural punctures. Abdomen above more regularly 

 and distinctly punctured than elytra, more feebly apically; beneath 

 with the punctures more distinctly muricate, and with numerous 

 large bluntly muricate punctures on the apical segments. Eighth 

 tergite of male broadly rounded; eighth sternite triangularly 

 notched, notch a little wider than deep, the angles obsolete. Eighth 

 tergite of female 4-lobed, the median pair narrower and separated 

 almost to base and slightly longer than the laterals ; eighth sternite 

 broadly rounded and with a single series of silken hairs. 



Type locality. — Louisiana. 



Lectotype.—Mws. Comp. Zool. no. 6494, bearing only an orange 

 disk and a determination label by Horn. 



Localities represented. — The present collections contain specimens 

 from the following localities: Vermont, Massachusetts, New York, 

 Ohio, Michigan, Indiana, Illinois, Iowa, Nebraska, North Dakota, 

 Colorado, Utah, Manitoba, British Columbia. This species has been 

 recorded also from Georgia, New Mexico, and Connecticut. 



Remarks.— This species is quite distinct and is readily recognized 

 by its color pattern. Even in very pale specimens the elytral spots 

 are distinguishable in the difference in transparency of those areas. 



TACHYPORUS ELEGANS Horn 



1877. Tachyporus clegans Horn, Trans. Amer. Ent. Soc, vol. 6, p. 103. 



Form robust and convex. Kufopiceous; head and scutellar spot 

 black ; abdomen darker or last two segments alone black. Antennal 

 segments 7 to 11 expanded, but all longer than wide, eleventh almost 

 twice as long as tenth. Third segment of maxillary palpi only 

 slightly dilated, fourth acicular. Pronotum with sides straight from 

 middle; not distinctly wider than elytra. Elytra very finely and 

 irregularly submuricately punctate and without sutural row of large 

 punctures. Abdomen above similarly punctured, beneath more dis- 

 tinctly and with numerous large bluntly muricate punctures on the 

 apical segments. Eighth tergite of male slightly produced into a 

 rounded lobe; eighth sternite with a shallow triangular notch nearly 

 twice as wide as long, with apex broadly rounded, and lateral angles 

 not very distinct. Eighth tergite of female 4-lobed, the median pair 

 narrower, equal to the laterals, and separated nearly to base; eighth 

 sternite broadly rounded, with a single series of silken hairs. 

 Type locality. — Canada. 



