June, 1920.] NiCOLAY AND WeISS : ThE GrOUP TrACHES. 139 



impunctate. sparsely clothed with short, white hairs, which are ar- 

 ranged in transverse lines on the al)dominal segments. The sexes 

 may^ he readily separated by the last ventral segment which on the 

 male bears an oblong impression at apex, apical margin produced in 

 the middle into two prominent processes each of which terminates in 

 three small teeth (very rarely with a trace of a fourth). The last 

 ventral segment of the female is not impressed, the a])ical margin 

 being produced in an acute point. Length, 2.5 mm. to 3.5 mm. 



Localities. — Van Cortlandt Park (Pearsall) ; Queens. L. I., Nov. 

 28, one specimen sifting leaves (Schott) ; Staten Island; New York. 

 Caldwell, Sept. 20, feeding on hickory (Nicolay) ; Ramsey, May 30 

 (Nicolay) ; Ft. Lee, June 9 (Shoemaker) ; Greenwood Lake, May 17 

 (Leng) ; Orange Mts., June 4 (Bischoff) ; Hemlock Falls, May 28 

 (Wenzel) ; New Jersey. Illinois. Iowa. Cypress Mills, April 2; 

 Texas. Lake, Marshall and Stark Counties, June 11, July 14. rare 

 (Blatchley) ; Indiana. Larva mines leaves of Lespcdeza (Smith). 

 Borer of hickory (?) (Felt). Larva in leaves of bush clover, Lespc- 

 deza and adults beaten from vegetation in marshy places (Blatchley). 



This species is taken around New York City by sweeping marshy 

 places during the spring. It occurs locally and is never common. The 

 larvce live in the leaves of bush clover. Mr. Schott took one specimen 

 while sifting leaves in November and the authors have found adults 

 feeding during September. From this it appears that the adults hiber- 

 nate. All of the specimens are remarkably constant in size (3.5 mm.) 

 with the exception of two specimens (male and female) before us 

 from Texas, which measure only 2.5 mm. Superficially they appear 

 to be at least a geographical variety but after studying them closely 

 no definite characters could be found. In view of this and until more 

 material is available, we think that they had better be placed with 

 purpiirciis. The dwarfed size may have been due to under nourish- 

 ment of the larv?e. 



Pachyschelus leevigatus (Say), 36-164. 

 ovatus \\ (Say), 25-252. 

 piinctatus (Gory), 41-347. 

 carbonatus (LeConte), 59-252. 

 poUtiis Kerrenians, 96-322. 



