REPORT OF THE STATE ENTOMOLOGIST 



395 



branous area, and the sclerites are slightly separated along the median line 

 (Fig. 5a). 



Fio. 5. — Sciara coprophila : Details of head of larva: a, ventral aspect of head; b, mandible; 

 c, maxilla; d. apical depression in maxilla wi h contained rudimentary palpus; e, outline of 

 clypeus, showing location of punctures. All greatly en Urged. 



Pupa. — Length, 2.5 mm. The form of the imago is readily seen; it is a little 

 stouter than in the perfect state. Head and thorax black; abdomen brownish; 

 coxae yellowish; legs brownish-black. The wings extend to the third abdominal 

 segment ; the tarsi to the fifth . 



In the earlier portion of the pupa state the eyes only are black and they 

 connect behind the antennae by a very narrow band; dark-brown patches 

 occur on the base of the antennae; the rest of the pupa is a variable yellowish- 

 white. As the pupa develops, the antennae, wing-pads and tarsi darken con- 

 siderably and the head and thorax darken a little ; finally the abdomen begins 

 to darken. 



Imago.— Plate I. Head and thorax black; antennae and abdomen dark- 

 brown ; setaceous. Wings hyaline and in certain aspects somewhat irrides- 

 cent. Coxa dusky-yellow; femur and tibia yellowish-brown; tarsi darker, 

 especially on the terminal segments. Apical portion of the halteres dusky, 

 basal portion yellowish. 



Length, 2.5 mm. The general appearance of the female is given in figure L 

 Three ocelli occur, the median one being anterior, — figure 2. The eyes are 

 deeply emarginate and extend to the median line behind the antennae; 

 facets separated by an unusually thick frame of chitine, — figure 3. 

 Antennae longer than the head and thorax, composed of 16 segments ; 

 the two basal segments are about as broad as long and bear a few 

 stout setae; the remaining ones are often slightly gibbous with extremities 

 rounded; pediceled distally and invested with numerous fine setae; width 

 to length as 4 to 7, see figure 6. The ridges represented upon the epis- 

 toma in figure 2 are partly internal and the upper portion of the inner ones 

 wholly so, but as they can be easily seen in semitransparency in a mounted 

 preparation, they are, therefore, indicated. The palpi are composed of four 

 segments,— figure 8: basal segment short; second, elongated, capitate distally 

 and bearing a distinct sensory pit; third, similar in form and shorter; fourth, 



e 



