18G4.] (;21 



pale:) and tliere was no perceptible bristle behind the antennse. Another, ex- 

 amined May 3, which liad worked its way entirely out of its cocoon in the vial 

 wliere it was isolated, differed in no respect, except that the notnni of the thorax 

 was dull sanguineous with two brown vittse and the seutel sanguineous, and 

 the dorsum of the abdonaen was tinged with brown Length (2 dried specimens) 

 .07 inch. The pu]ial integument (7 specimens) is white, with the antennpe and 

 the anterior extremity of the body scarcely or not at a'l tinged with dusky. 



Imago. Cecidomyia albovittata n. sp. % 9 (Recent.) — Generally pale umber- 

 brown, sometimes umber-brown or brown-black, beneath paler. Head with its 

 posterior surface uniformly without any white line next the eye. Antennae % 

 fuscous, fully f as long as the dried body, 14 — 15-jointed (2-|-12 to 2-f-l.^), ta- 

 pering towards the tip, the joints of the flagellum spherical, with the pedicels 

 often whitish or translucent and equal in length to the spherical part of the 

 joint, tlie verticils to the full as long as the two complete joints from which they 

 arise, and the last joint sometimes sessile, sometimes almost confluent with the 

 penultimate, and sometimes represented by a slender, cylindrical ])rolongation 

 of the penultimate. Antennae 9 fuscous, about A as long as the dried body exclu- 

 sive of the oviduct, a little tapered towards the tip. the joints sessile, almost 

 cylindrical at base, perfectly so at tip, so as to lie very difficult to count, but 

 probably nearly as numerous as in 'J, , the verticils almost reduced to an irregu- 

 lar pilosity scarcely i as long as % verticils. Thorax with a row of whitish 

 hairs in each longitudinal stria, giving the appearance of two whitish vittse. 

 and with irregular, lateral, whitish hairs, the 3 interstices glabrous. Origin of 

 the wings and a large spot beneath them orange-color or sanguineous, in the 

 dried specimen dull rufous. Halteres pale, the club more or less infuseated. 

 Abdomen % generally clay- or honey-yellow, sometimes yellowish-fulvous, very 

 rarely rufo-sanguineous, the dorsum with short, umber-brown hairs, which occa- 

 sionally, when the abdomen is much plumjjed out, become so sparse as to not 

 at all hide the color of the integument, but are almo=t always located in such a 

 manner and so densely, as to entirely conceal tlie color of the whole of each 

 joint, or sometimes to conceal only the medial \ of each jomt, and sometimes to 

 conceal all but the sutures. In three specimens where the abdomen, although 

 recent, is much less plump than is usual, and has collapsed so as to leave a deep, 

 dorsal longitudinal stria, the brown hairs are colle.ited in that stria so as to as- 

 sume the appearance of a narrow, linear, dorsal vitta. Venter with more or 

 less dense, whitish hairs. ^46tZowie« 9 generally bright sanguineous, sometimes 

 sanguineous, rarely rufo-sanguineous. the dorsum with umber-brown hairs va- 

 rying in their arrangement and denseness precisely as in '^ , except that in two 

 9 9 ^^^^ six basal joints, and in two others the three basal joints of the abdo- 

 men had their posterior h covered by the brown hairs and the anterior J gla- 

 brous and sanguineous. A 9 < ten minutes after emerging from the pupa, had 

 the dorsum of each joint, except the sutures, concealed by the brown hairs. A 

 single mature 9 ^^<^ the anterior s of the abdomen creamy yellow, with the 

 brown hairs of the dorsum collected in an acute, longitudinal, dorsal stria, so 

 as to simulate a linear, dorsal, browu vitta, as in the 3 'J, 'J, above referred to. 

 while the posterior i, including the oviduct, was sanguineous and normal with- 



