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JOURNAL OF ECONOMIC ENTOMOLOGY 



[Vol. 9 



part or "rake" is prominent (Fig. 256). The second day shows an 

 increase in size to 830 microns, the color remaining practically the same 

 except that some of the yellow bodies have disappeared. The size 

 increases gradually until a point is reached when the larva attains a 



Fig. 25. Columbine leaf-miner: a, eggs; h, mouthparts 

 or "rake"; c, larva; d, pupa. 



length of 1650 microns. The full grown larva is translucent, greenish 

 when chlorophyl is present in the alimentary tract, hyaline at other 

 times; segmentation is not distinct. The chitinous mouthparts are 

 dark brown to black and the tips of the spiracles light brown. There 

 are two erect spiracles on the anterior segment and two larger 

 widely divergent spiracles on the posterior segment. The spiracular 

 opening presents from above, a double rosette appearance (Fig. 25c). 



The Puparium 

 The puparium is nearly oval in outline viewed from the dorsal as- 

 pect. Viewed from the side, the dorsal surface presents a considerable 

 convexity, reaching its highest point at the middle segment. Ventral 

 surface only slightly convex. Length 1250 to 1500 microns. The an- 

 terior and posterior spiracles are at the extremities of short pedicles. 

 Segmentation distinct (Fig. 25(i). 



The Adult 

 It has been thought best to draw up a revision of the original de- 

 scription by Hardy, since that is in a publication not generally accessi- 

 ble and the description is written in Latin. The present description 

 varies only slightly from that of Hardy, particularly in regard to the 

 color of the proboscis, which he refers to as white and the wings 

 which he describes as hyaline. 



General color dark brown to black, especially on the dorsum. Lengtli: from tip 

 of arista to tip of wing 2.8.5 mm.; from tip of arista to tip of abdomen 1.75 mm. 

 Front yellow around ocelli, shading to black at base of antennae. Two proclinate 

 ocellar bristles, three orbital bristles, two pairs of verticals; oral vibri.s.sap short and 



