PROC. ENT. SOC. WASH., VOL. 20, XO. 1, JAN., 1918 



Clusiodes pictipes Zetterstedt. 

 Heleroneura pictipes Zetterstedt, Dipt. Scand., Vol. 12, p. 4816. 1855. 



This species has been recorded from Mount Washington, N. 

 H., but there is some doubt about the correctness of the 

 identification. 







Genus Heteromeringia Czerny. 



There are four species of this genus recorded as occurring in 

 North America, three of which are in the collection here, one of 

 them being represented by larvae, puparia, and imagines. 



Key to Species 



1. Species almost entirely yellow 



Species almost entirely black 



2. Bristles on head yellow; thorax without blackish spots on pos- 



terior portion of disc flaviseta 



Bristles on head black; thorax with a large black spot on each 

 side of disc posteriorly lutifrons 



3. Fore legs entirely yellow; hind femora and tibiae yellow, annu- 



lated with brown (iiui.uli.pes 



Fore legs with the exception of the basal half of femora black; 

 hind legs yellow, sometimes slightly brownish on bases of tibiae 



nitida 

 Heteromeringia flaviseta Johnson. 



Heteromeringia flaviseta Johnson, Psyche, Vol. 2G\ 1913, p. 99. 



Larva. Length, 4-6 mm. Milk-white, slightly shining. 



Cephalic papillae small but distinct; cephalopharyngeal skeleton not 

 chitinized internally, the only chitinized portions consisting of 2 small, 

 yellowish, almost straight, downwardly directed processes which function 

 as mandibles; anterior respiratory organ 6-lobed; body segments dis- 

 tinct; postsutural locomotor spinules very small, arranged in short trans- 

 verse series on a moderately broad band on middle of ventral segments 

 and anterior margins of dorsal segments; posterior spiracles much elevated, 

 located on a pair of flat chitinized plates, the outer upper angles of each 

 of which are produced comically upward. 



Puparium Length, 3-4.5 mm. Brownish red, subopaque. 



Cephalic extremity depressed dorsoventrally; anterior respiratory 

 organs slightly protruded; first segment coarsely rugose, dorsum ot thor- 

 acic segments smooth, remaining segments with rather sharp, coarse, 

 regular transverse rugae; metathoracic respiratory organs undeveloped; 

 apical abdominal segment with a sharp marginal ridge which is most 

 distinct vent rally; apex truncated, the spiracular plains more distinctly 

 elevated than in the larva; anus with a large dark plate which is trans- 

 versely oblong and covers the greater portion of the la.^i segment. 



