ART. 2 LARVAE AND PUPAE OF THE FAMILY LEPTIDAE GREENE 7 



transverse widely separated rows of spines ; in the posterior row the 

 spines are larger and some have a hair-like termination: each seg- 

 ment from 1 to 7 has a small spiracle (fig. f) which in color and 

 shape looks like the thoracic one (fig. s), and below each spiracle 

 is a spine; last segment is rounded posteriorly and has a tail-hke 

 prolongation; anteriorly, there is a transverse row of four widely 

 separated, long, pointed spines terminating like a hair: at the middle 

 is a transverse, granular, dull area, and posteriorly it ends with a 

 pair of broad, bifid lobes; each lobe is compressed, rounded clorsallyy 

 but ventrally sharp and spine-like; ventrally and near the base the 

 segment bears two widely separated pairs of small spines. Leg 

 capsules reach to the first fifth of the second segment. 

 Length, 8-10 mm.; width of thorax, 1.5-2 mm. 



XYLOPHAGUS LUGENS Loew 



Plates 1 and 2 



Hnhits. — Larvae are predacious on beetle larvae and were found 

 under the bark of chestnut, pine, and oak. 



LiU'va {fg. 3). — Very much like XyJophagus ahdominalis with the 

 following exceptions : The anterior portion of the head has a single 

 bristle on each side; posterior to this bristle are two others closely 

 set together and at the base is a single bristle; the chitinous plates 

 on the dorsum are absent on segment 3 ; on the anterior edge of the 

 chitin of the first segment is only a single bristle on each side; 

 anterior spiracle (fig. g) is deep red with the anterior portion 

 rounded and the posterior terminating in a long, narrow band; 

 the anterior portion has a transverse, reddish yellow, crescent-shaped 

 area divided into narrow parallel structures, Avhich are pointed 

 anteriorly, and in front of this area is a narrow, black, curved band ; 

 just back of the reddish yellow crescent-shaped area is a narrow, 

 light-colored, spindle-shaped one inclosed by a darker ring. Caudal 

 plate bifid at apex with the tAvo prongs widely separated at the base ; 

 posterior spiracle (fig. h) is elliptical, slightly elevated, very dark 

 red, and apparently open in the center; the design following the 

 contour is arranged as a double row of short serrat lines. Ventral 

 sides of segments 1 and 2 either entirely covered or nearly cov- 

 ered with chitin : anal plate almost circular and the roughened 

 border around this plate and the V-shaped arms on each side are 

 very wide. 



Length. 15-10 mm. ; diameter, 2-2.75 mm. 



Great Falls, Va. : larvae under bark of chestnut feeding on larvae 

 of U rographis fasciata (Degeer). Larvae collected March 28, 1917; 

 adults emerged April 2, 1917, C. T. Greene, collector. Virginia 

 shore, near Plummer Island; no date; H. S. Barber, collector. Dead 



