206 NEW YORK STATE MUSEUM 



Asteromyia is closely related to Lasioptera, having the alar and 

 antennal characters of this genus, though it is easily distinguished 

 therefrom by the uniarticulate or biarticulate palpi. The fused 

 third and fourth antennal segments, the invariably unidentate 

 claws and the well developed pulvilli prevent the reference of these 

 forms to either Baldratia or Stefaniella. Furthermore, numerous 

 rearings in this group have shown that the species breed almost 

 exclusively in leaf tissues and generally in the peculiar, apparently 

 fungous affected spots on the leaves of aster and goldenrod. Type 

 Lasioptera carbonifera Felt. 



Key to species 



a Tarsi distinctly white or yellow-banded 



b All the tarsal segments with bands basally 



c Tarsal bands yellowish white, the fifth tarsal segment of the pos- 

 terior legs yellowish; male and female with 16 antennal segments; 

 palpi biarticulate, the third vein uniting with costa near the basal 

 half. Reared from oval, black blister galls on Solidago grami- 



nifolia carbonifera Felt, C. ai354 



cc Tarsal bands white; 15 antennal segments; palpi biarticulate; the 

 third vein uniting with costa near the distal third. Reared from 

 oval, black thickenings on the flower stems of Gutierrezia sarothrae 



gutierreziae Felt, C. 1623 

 bb Posterior tarsi only narrowly annulate basally with whitish 



c Female with 22 antennal segments; palpi probably biarticulate. 



Reared from a rosy blister gall on Solidago rugosa 



rosea Felt C. a.14.74. 

 aa Tarsi unicolorous or nearly so 



b Abdomen conspicuously. yellowish or orange in part at least 



c Abdomen light fuscous yellowish; antennae with' 13 segments; 



palpi uniarticulate. Reared from Solidago 



socialis Felt, C. ai568 1 



cc Abdomen with the basal segment fuscous yellowish, male with 13-14 



antennal segments; terminal segment compound, composed of 



two closely fused; palpi uniarticulate. Reared from Erigeron. . . . 



mode st a Felt, C. 1427, ai427x, ai666, ai666a 



ccc Abdomen with the basal four segments fuscous, the distal segments 



yellowish brown; antennal segments, male, 13; female, 18; palpi 



uniarticulate. Reared from greenish or blackish blister galls on 



Grindelia grindeliae Felt, C. a23ia. 



cccc Abdomen mostly deep orange, segments one to five sparsely clothed 

 with dark brown scales and narrowly margined with a few white 

 scales; antennal segments, male, 14; the terminal segment simple; 

 palpi uniarticulate. Reared from oval swelling on aster leaves. . 



vesiculosa Felt, C. ai884 

 ccccc Abdomen a nearly uniform yellowish brown; antennal segments of 

 the male, 16 or 17; the fifth with a length three-fourths its diam- 

 eter; palpi probably uniarticulate. Reared from Chrysothamnus 

 leaflets chrysothamni Felt, C. a2055 



