250 On the Hymenoptera of the Genus 



Hab. Brooklyn, N. Y. (Mr. Mdiurst). 



One specimen examined. The abdomen and posterior 

 legs are much shorter than in the preceding insect. 



Sp. 28. A. verticalis. 



Tenthredo verticalis. Sav. Long's. Sec. Ex. II. 317. 9 

 " Head pale yellow ; vertex and antennae black ; tergum 

 yellowish, spotted with black, tip black. Length of the 

 body three twentieths of an inch." 



$ The male is not described. It resembles the female, 

 except that the cheeks are entirely yellow ; the pleura, 

 pectus, and venter, pale yellow ; tergum testaceous yellow, 

 with two black spots on each of the two basal segments, 

 and the terminal segments sometimes dark or black ; pos- 

 terior tibiae entirely testaceous ; a V on the prothorax 

 sometimes takes the place of the four lines mentioned by 

 Say. 



Hab. Northwest Territory (Say), Massachusetts (H. 

 Coll.), Connecticut and Pennsylvania (Dr. Clemens). 



Twelve specimens examined. The size indicated by 

 Say is evidently an eiTor, for all those that I have seen 

 are from nine to nine and a half twentieths of an inch in 

 length. 



Sp. 29. A. dissimilis. Nov. spec. Black, with the face 

 and six lines on thorax yellow, and terminal half of abdo- 

 men rufous. (Long. 0.4o in. Ex. alar. 0.90 in.) 



9 Head and thorax black ; antennae very long, a little 

 flattened in middle ; clypeus truncate, a deep scallop in 

 middle ; la brum produced, rounded ; a line abont the or- 

 bits, interrupted opposite the upper oce^Ui and again oppo- 

 site the antennae, two dots back of ocelli, the face about 

 and beneath the antennae, base of mandibles, and palpi, 

 straw yellow ; wing-scale and edge of collar, four lines in 

 front of thorax, as in A. verticalis, and one on each side 

 of scutellum, the tip of scutellnm, and two pairs of dots 

 behind, yellow ; sides of basal membrane and the four 



