386 



Descriptions of 



y 



Missouri 



BoAy black, with dense, rather large punctures : clypeus 

 -yellow, emarglnate at tip : mandibles yellow, honey-yel- 

 low at tip : antenncB^ basal joint yellow, with a black line 

 above : front with a yellow line from the base of the 

 antennae, into the emargination' of the eye, and a small 

 spot above the interval of the antenna, yellow ; thorax, 

 a bi-lobed snot on thp 



anterior 



small spot beneath it, and transverse spot behind the 

 scutel, y eWo^ : wings dusky: tergum not so grossly 

 punctured as the thorax ; first segment with a yellow 

 posterior margin ; second with a yellow small dot each 

 side, and yellow posterior margin extending around the 

 venter ; remaining segments obsoletely margined at tip 

 with yellowish : feet yellow ; thighs black at base. 

 ' Length over three tenths of an inch. 



Like the acutus, Latr. but may be distinguished by its 

 more gross puncturing, as well as by the yellow dots on 



the tergum. 



/ 



Mis 



3. O. quadridens, Linn. (Vespa, Syst. Nat.— Amoen. 



) 



The remark " size o^ parte- 



\ 



tina " may refer lo the male. 



4. O. uncindta, Fabr. (Vespa, Syst. Piez. p. 25). 

 Fabricius mistook this species for the quadridens, L., 

 which is our largest and most common species, and' suffi- 

 ciently distinguished from the present, besides the denti- 

 culated metathorax, by many characters ; and the follow- 

 ing is a detailed description of it. 



$ Black ; tergum with a yellow band. 



inhab. Indiana. 



w 



Body black, punctured : head, short line behind the 

 eye, dot above the interval of the antenna, one exterior 



