238 



PROCEEDINGS OF THE NATIONAL MU8EUJ1I. 



VOL. 39. 



Fig. 3.- 



-MAYRELLLT3 MIRABILIS, ANTENNA OF 

 FEMALE. 



elongate, as long as the mesonotum and prothorax together and ex- 

 tending OYer the metathorax and propodeum to the base of the 

 abdomen; axillae widely separated but nearer together than the parap- 

 sidal furrows; propodeal spiracles large, round; stigmal joined to 

 marginal by a triangular infuscated area making the marginal vein 

 appear enlarged apically; claws with a tooth beneath near base; hind 



tibiae with two apical spurs; abdo- 

 men flattened above. 



This genus belongs to the group 

 of Asparagohius, Trichilogaster, and 

 Monopleurothrix, all being gall mak- 

 ers. To show the relationships these 

 genera may be briefly characterized 

 as follows: Asparagohius, antennae 

 with one ring joint, parapsidal fur- 

 rows widely separated, inner ends of 

 axillffi touching inner ends of parap- 

 sidal furrows; Trichilogaster, anten- 

 nae with two ring joints, parapsidal 

 furrows widely separated, axillae meetmg medially; Monopleurothrix, 

 antennae with two ring joints, parapsidal furrows uniting before reach- 

 mg scutellum, axillae meeting medially. 



This genus is named in honor of Dr. Gustav Mayr, who described 

 the other genera belonging to this group. 



The placing of this series of genera in the Perilampidae is subject to 

 much doubt. They will probably form an independent group. 



MAYRELLUS MIRABILIS, new species. 



Female. — Length about 3 mm. Form stout, head and thorax black, 

 finely rugulose; face above sparsely, umbilicately punctured down to 

 a point about one-half way from the 

 ocelli to the insertion of the anten- 

 nae; below with sparse, shallow punc- 

 tures; antennae brown, scape and 

 pedicel, yellowish, fourth ring joint 

 about twice as long as third ; mesono- 

 tum, except middle of parapsidal areas 

 at rear, closely umbilicately punc- 

 tured; axillae with umbilicate punc- 

 tures only at inner ends; scutellum 



with a median furrow extending back from base about two-thirds 

 its length; this furrow with more or less distinct longitudinal rugae 

 and at times with a median longitudinal carina; scutellum rugoso- 

 umbilicately puctured, except area at end of furrow, which is finely 

 rugulose with a few longitudinal rugae; front wings on anterior half 



Fig. 4.— Mayrellus mirabilis, female. 



