896 NEW YORK STATE MUSEUM 



or less distinctly visible on each segment. The b3'popygium con- 

 sists of two jointed hooks, is pale brown in color, nearly as long 

 as an abdominal segment [lig.S]. Venter and the legs are pale 

 yellow, the last two or three tarsal joints slightly infuscated. 

 Legs and abdomen densely but delicately haired; wings yellow- 

 ish, the veins scarcely dark; venation as in figure 10; halteres 

 pure white. Length '5^nim. 



Female. Differs from the male in the following particulars. 

 Antennae entirely yellow, basal joint, palpi and upper surface 

 of proboscis with a tinge of brown; frontal spot brown; scutel- 

 lum with a fine median line and its posterior margin pale yel- 

 low; abdomen yellow, dorsal surface with a tinge of brown, 

 s])ecially on the posterior margin. The two little white spots- 

 with pale brown margins also present on each segment. Anal 

 segment brown, genitalia yellow, venter, legs, halteres etc. as 

 with the male. Wings as in figure 9. Length 5mm. Described 

 fj'om alcoholic specimens. New Jersey, Illinois, New York, Min- 

 nesota. 



Larva ditfers from Meinerts description [loc. cit.] of the Euro- 

 pean p 1 u m i c r n i s in the following particulars. The four 

 long bristles of the antennae are of equal length, while in the 

 P^uropean form one is distinctly shorter than the rest; the head 

 in all alcoholic specimens is more sharply constricted from the 

 thorax. In Weissmann's figure the siiines of the antennae are 

 shown of equal length. 



The larva is colorless, in alcoholic specimens pure white; the 

 large eyes, the pair of air sacs in the thorax and in the seventh 

 abdominal segment are black and the tips of the mandibles 

 brown. The head is somewhat elongate, subconical, the antennae 

 pendant [fig.4a], each with four long bristles of equal length. 

 Caudad of those are 10 filaments, five on each side of the median 

 line [fig.4&] ; these are the filaments of the third metamere of 

 Meinert. Then comes the pair of leaflike appendages, ap- 

 pendages of the third metamere of IMeinert, [fig.lc] ; following 

 which is the labrum. 



The labrum [fig.4?] is an elongate fleshy, fingerlike process, ter- 

 minating in several tufts of hair. The two ventral tufts each with 

 from 20 to 25 coarse hairs. At the base and somewhat cephalad 

 of the mandibles [fig,4//i] are the fans [/] each consisting of 

 from 18 to 22 long, coarse hairs. The mandibles [ni] have 

 four or five teeth, two stout spines anteriorly, and a serrate 

 posterior margin. Closing in the lateral posterior margin of 

 the mouth are the maxillae [fig.a?] ; fleshy lobes, each with a 

 long, jointed appendage anteriorly and two short stout spines. 

 At the posterior border of the mouth is the labium [/] with 



