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Stefaniella falcaria n. sp. 



This peculiar form is referred with very little question to this genus, 

 though it differs in some respects from the type species. It seems best for the 

 present at least, to consider it as simply an extreme type of specialization rather 

 than erect a new genus. A series of insects were reared from a globose or ovate 

 leaf gall on Avicennia officinalis L., the larvae occurring here and there within 

 the abnormal tissue and very frequently two adjacent leaves were affected. 

 Apparency the same species was reared from another somewhat different 

 gall on the same plant. The data on the label of the type lot is as follows: 

 Avicennia officinalis L. Semarang 27/1 V, '14, DvL. Marcellia IX, S. 40, No. 96. 

 There was a considerable series of females, at least two males and several 

 pupae in the lot. 



The label on the other lot, with little question referable to this species, 

 is as follows: Avicennia officinalis L. Semarang 29/1 V, '14, DvL., Marcellia 

 IX, S. 40, No. 97, Ganz bleiches Tier. 



Male. Length 2 m.M. Antennae hardly extending to the base of the wings, 

 yellowish brown, darker basally, 14 segments, the 3rd and 4th free, the 5th with a 

 length '/4 greater than its diameter. Terminal segment slightly reduced. Palpi, first 

 segment broadly oval, the second narrowly oval and much smaller, Mesonotum reddish 

 brown, scutellum a little lighter, postscutellum yellowish, abdomen mostly yellowish 

 brown, wings hyaline, apparently sparsely clothed with scales, the third vein uniting with 

 costa at the distal fourth. Haltères whitish transparent. Coxae yellowish, legs mostly 

 pale straw, claws long, stout, strongly curved, unidentate, the pulvilli nearly as long as 

 the claws. Genitalia, basal clasp segment short, stout, terminal clasp segment swollen 

 basally, moderately long, chitinized and distinctly pectinate apically. Dorsal plate apparent- 

 ly deeply and triangularly emarginate, the lobes rather broad and thickly setose. Ventral 

 plate moderately long, broad, triangularly emarginate, harpes long, irregular. 



Female. Length 2.5 m.M. Antennae 

 hardly reaching to the base of the wings, yellow- 

 ish brown, 14 segments, the 5th with a length 

 34 greater than its diameter, the terminal seg- 

 ment subglobose, palpi biarticulate. Mesonotum 

 and scutellum yellowish brown, postscutellum 

 Fig. 1. Stefaniella falcaria, side view yellowish, abdomen yellowish orange, wings 



of the posterior extremity of the ab- ^yahne. Haltères pale yellowish. Coxae yellow- 



domen showing the extended falcate -^ f j 



portion of the ovipositor. ish brown, legs mostly pale straw. Claws long, 



stout, strongly curved, unidentate, the pulvilli as long as the claws. Ovipositor about half 



the length of the abdomen, the distal portion stout, strongly chitinized and falcate. 



Type. A 3089 N. Y. State Museum. 



