87 

 A Leaf -Mining- Cranefly in Hawaii. 



BY O'I'TO II. SWK/.KY. 



Dici'diioiii i/Ki I ohocnmciihifo)' ii. sj). 



Head, antennae and mouth parts dark fuscous; thorax and abdo- 

 men fuscous above, ochraceous below, abdomen sometimes greenish 

 below: halteres fuscous, the stem paler; wings fuscous-hyaline, not 

 spotted except a spot of more intense fuscous at the termination of 

 the first longitudinal vein; auxiliary vein for the last three-fifths 

 running very close to the first longitudinal vein, terminating a little 

 before the origin of the second longitudinal vein, connected with first 

 longitudinal a little before termination; venation as shown in Fig.; 

 legs slender, fuscous, femora paler towards base, coxae and trochan- 

 ters ochraceous. Letigth of body, 4mm.; wing, 5mm. 



HABITAT. Larvae mining the leaves of Cyrtaiidra paJii- 

 (]()sa and other species of Cijrfandra, in the inonntains at Pnna- 

 hm, (in the windward side of Oahn. Xo adnlts collected. I 

 first discovered the mines of this insect in the leaves of Cyrtan- 

 dva bnshes o-rowing along the Pnnalnn Trail, Jnne 11, 1911, 

 and reared a few specimens. Later, on the following dates, I 

 again collected mined leaves and reared a few more specimens : 

 Angnst 10, 1013; September 13, 1914. The adnlts proved to 

 be different from any hitherto described species in Hawaii. 



]\1IXK. The mine is long and .slender, more or less sinnons 

 and wandering abont the leaf, often following the margin, grad- 

 nallv widening as the larva increases in size. There may be as 

 many as a dozen mines in one leaf. 



LARVA. The f nil-grown larva is 10-1 Innn., elongate, slen- 

 der, cylindrical, gradnally ta])ering posteriorly, withont setae, 

 footless, anterior and posterior margins of segtnents (except 

 3 or 4 anterior and 2 posterior ones) -minntely ronghened on 

 dorsal and ventral surface to assist in locomotion. Whitish, 

 trans]mrent so that the alimentary canal and tracheal system are 

 ])lainly seen, the latter having two longitndinal tracheae con- 

 necting with two black spiracles above the anns. Llead with 

 In-ownish mouth-parts, mandibles working horizontally, the 

 whole head retracting into tlie following segment which in tnrn 

 retracts into the next. Segments 1-3 of moderate length, 4-10 

 elongate, remaining segments short. 



PUPA. The pupa is formed within the mine, the larva 



Proc. Haw. Ent. Soc. Ill, No. 2, July, 191.5. 



