OF WASHINGTON, VOLUME XIX, 1917 177 



Adirus trimaculatus (Say). 



A somewhat pinkish-white, cylindrical larva with slightly enlarged 

 thorax, 21 mm. long when nearly full gro\\ n. 



Head. Dorsad ventrad length 2 mm., breadth 1.66 mm., pale but with 

 mandibles, their articulations, and labrum, chitonized and darkened; 

 antennae 4 jointed. 



Thorax. With 3 pairs of small, mamma-like, unchitonized, fleshy, legs; 

 faintly yellowish chitonized spots on pleura; prothorax similarly chiton- 

 ized dorsally. 



Abdomen. Segment 3 annulate (or 4, counting the intersegmental skin) ; 

 pleura prominent with a slight, possibly very faintly chitonized, longi- 

 tudinally creased, swelling; prolegs absent with a pair of slight, pale, humps 

 on the 8th abdominal segment and a similar slightly yellowish chitonized 

 pair on the 9th; dorsal anal lobe, terminating in a prong; anal plate, 

 ventral anal lobe and lateral area of dorsal anal lobe haired; lateral area 

 of dorsal anal lobe yellowish with chiton, the ventral anal lobe with pal- 

 piform appendages and attended by several spines detached from the nu^s 

 of that lobe's ornamentation. 



This species is recorded 1 boring in blackberry while the speci- 

 men described was received through Dr. F. H. Chittenden's 

 office as coming from rose. 



Janus abbreviatus Say. 



A whitish cylindrical larva, 12 mm. long when nearly full grown and 

 somewhat enlarged dorsally and laterally in thorax. 



Head. Dorsad ventrad length 1.75 mm., breadth 1.50 mm.; pale, but 

 with mandibles, their articulations and labrum, chitonized and darkened; 

 antennae 5 jointed. 



Thorax. With 3 pair' of small unchitonized mamma-like, fleshy, legs; 

 faintly yellowish chitonized spots on the pleura; prothorax similarly 

 chitonized dorsally. 



Abdomen. Segments, distinctly 2 annulate laterally and with a small 

 third annulet dorsally; pleura prominent; venter 3 annulate; prolegs ah- 

 sent; a pair of pale, rounded humps on the 8th abdominal segment and a 

 pair of similarly placed but less elevated, yellowish, chitonized, spots on 

 the 9th; dorsad anal lobe terminating in a prong; anal plate and ventral 

 lobe somewhat haired; lateral area of dorsal anal lobe bare excepting 2 or 

 3 long prominent hairs and more yellowish than anal plate or ventral anal 

 lobe; the ventral anal lobe with palipfonn appendages at the posterior 

 lateral extremities. 



1 Connecticut State Geological and Natural History Survey Bulletin 

 N. 22. 



