OF WASHINGTON, VOLUME XVI, 1014 133 



Metriocnemus lundbecki Johannscn, Bull. 85, X. Y. State Mus., 1895, 

 p. 302. 



Larva: Length, 4-5 mm. Yellow, or buff-colored. Head deep yellow, 

 slightly longer than broad, tapering slightly on anterior half; antenna 

 rather slender, its entire length about equal to one-half the width of head 

 (fig. 1); mandibles stout (fig. 2), heavily chitinized, yellow at base, be- 

 coming gradually darker towards middle, the apical half, including all the 

 teeth, almost black, 4 weaker, rounded, almost equal-sized teeth along 

 inner margin; two long and rather strong hairs at base of mandiblo on 

 ventral surface; two slightly weaker hairs on under surface of mandible 

 near middle; lateral arm of epipharynx long, ending in three or four in- 

 curved teeth; labium with its anterior half blackened, marginal teeth MS 

 in fig. 3; two long hairs situated near to eye spots. Anterior pseudopods 

 armed at apices with weak hairs; a weak lateral hair on each of the thoracic 

 segments; posterior pseudopods with strong apical claws which have pro- 

 duced bases; no ventral respiratory organs on eleventh segment, the two 

 dorsal pairs on twelfth short; anal tuft consisting of six sensory hairs, the 

 basal process about twice as long as its diameter. 



Pupa: Length, 3 mm. Greenish yellow. Frontal tubercles indistin- 

 guishable; 2-3 hairs on the anterior margin of thorax on each side; respi- 

 ratory organs shaped as in fig. 4; anterior to and in line with these organs 

 are four hairs, a pair on each side; abdominal segments, except segment 

 one, covered on the dorsum with very minute stout seta? which become 

 much stronger posteriorly and form a distinct comblike transverse row on 

 the posterior margin of each segment, as indicated in fig. 5; the mem- 

 branous portion of segment between the setulose margin and apex of the 

 succeeding segment presents a distinctly reticulated or honeycombed ap- 

 pearance, the intersecting lines clear, the central portions fuscous; ventral 

 segments very similar to those of the dorsum; anal appendages as in fig. 5, 



Male: Yellow, slightly shining; mesonotum trivittate, the central vitta 

 divided longitudinally by a distinct yellow line, and posteriorly abbrevi- 

 ated, the lateral vitta? abbreviated anteriorly; color of vittrc reddish; 

 pleura? brownish on lower half; scutellum yellow; postnotum brown. 

 Abdomen yellow, the apical 2-3 segments obscurely brownish. Lci;s 

 yellow, the apices of tarsi slightly infuscated. Wings clear, veins yellow. 

 Halteres yellow. 



Antenna slightly longer than head and thorax together, last joint sub- 

 equal in length to the remainder, distinctly cleft, as shown in fig. (i, the 

 other joints of flagellum also cleft, but not so distinctly. Apical portion 

 of lateral arm of hypopygium slipper-shaped, turned back on inner side of 

 basal portion, its apex with a short thornlike bristle which is directed al 

 right angles to the long axis of the arm (fig. 7). Fore metatarsus nearly 

 three-fourths as long as fore tibia; no long hairs on tarsi, those on mid and 

 hind legs barely longer than diameter of the joints upon which they arc 

 situated; fourth joint of fore tarsus one and a half times as lung as fifth. 

 fourth and fifth joints of mid and hind legs subequal; empodium present 



