OF WASHlMiTOX, <VOLl MK XIX. 1<H7 117 



resembling the scales of a snake skin. The dorsal and ventral bristles are 

 yellowish-brown and the ventral bristles are located about like those on 

 t he dorsum. 



Head: The head resembles a beak, much darker at the apex; along the 

 entire vertical length of the dorsum of the head, is a broadly rounded rfdge 

 terminating into a sharp point. 



On each side of the anal opening are three bristles, in a vertical row, arid 

 a single bristle, near the base of the segment which is located bet v\een thi> 

 row and the lateral edge. 



For general details see the drawing. 



Pupation takes place in the larval skin and the pupa looks identical 

 with the larva; the only difference is, the flexible skin along the segment al 

 lines becomes rigid. The adult emerges by pushing off the head and split- 

 ting the first two segments down the middle of the dorsum. 



Mydas clavatus Drury. 

 Illustrations of Nat. Hist., I, p. 103. 



The larvae of this species were collected at Falls Church, Va. 

 by Mr. T. E. Snyder and the author, in the rotten roots of a dead 

 tulip stump. All the larvae were well below the ground, where 

 I he wood was quite moist; they resembled the wood fibres so closely 

 that they might often be overlooked. The larvae are predaceous 

 on Coleopterous larvae and one larva devoured an earth worm. 

 placed in the breeding jar. In the same roots were several larvae 

 of the following Coleopterous genera, Alans, Parandra and Pel- 

 agnota. 



Only one larva pupated, June 1, 1914 and the adult emerged 

 .fiuie 27, I'.M-l. 



Larva (plate XVII, fig. 1). 



The larva is 40 mm. lon and little over < nun. wide, nearly cylindrical. 

 Smooth, opaque, ivory white. 



The beak is 1.5 to 2 mm. long, when extended, heavily chitinized and of 

 a dark brown color. It is retractile into the first segment. The beak is 

 split in the center of the apical half. On the dorsal side are three pairs of 

 yellowish-brown, proclinate, bristles; the middle pair are the smaller and 

 an- sometimes divaricate and the posterior pair are the larger. Sides of the 

 larva are parallel, tapering to a point from the third to the first segment. 



The first segment has two faint longitudinal grooves near the middle 

 and one near each lateral edge, on the dorsum and the venter. All the 

 other segments have the lateral grooves which form the following ridgi" 

 on the sides of all the segments, and the entire length of each, is a broad 



