CHARLES W. HOOKER. 101 



all of this territory, but so far as is now known the others 

 have a more restricted distribution. 



The species which compose this genus are large, bright 

 colored insects, conspicuous in any collection. Nothing is 

 known of their life history, habits or hosts, but these prob- 

 ably differ but little from those of the closely related Thyreo- 

 dons. 



Table of Species. 



1. Flagellum of antennae and abdomen black, with or without cyaneous 



reflection 2. 



Flagellum of antennae and abdomen not black 4. 



2. Legs and mesonotum entirely black fenestratus Tasch. 



Legs and mesonotum not entirely black, four anterior legs more or 



less flavous 3. 



3. Wings with apical fuliginous band in both apicalis Szep. 



Wings with apical fuliginous band, radial and median cells more or 



less black atriventris Cress. 



4. Apes of wings fuscous fulvescens Cress. 



Part of radial and marginal cells and stripe along basal vein black. 



armstrongi n. sp. 



Athyreodon fenestratus (Tasch.). 

 Ophion fenestratus Taschenberg, Zeitschr. f. d. Ges. Natur. , 46, 



p. 425, n. 4, 9 1875. 



Dalla Torre, Cat. Hym., Ill, p. 190 1901. 



Macrophion fenestratus Szepligeti, Gen. Ins., Hym., 34'"^ Fasc, 



p. 33, n. 1, pi. 2, fig. 13 1905. 



Thyredon " Szepligeti, Idem, p. 25, n. 7 1905. 



Macrophion " Schulz, Spolia Hym., p. 97 1906. 



Cyaneous ; mesonotum and abdomen black with a bluish reflection ; 

 tnesopleurcB and pectus sanguineous , win^s fulvoferruginous with a large 

 subhy aline nearly transparent spot in the discocubital and discoidal cells. 



Length, 26-30 mm 



Eyes and ocelli large ; antennae black ; frons and clypeus densely and 

 finely punctured ; frons rugose, with a median keel extending below 

 the base of the antennae; clypeus rounded in front. 



Thorax smooth and shining ; mesonotum and metathorax black ; 

 mesopleurae, mesosternum and sometimes the metapleuras sanguin- 

 eous; mesonotum with parapsidal furrow distinct ; metathorax rugose. 

 Wings fulvofuscous, with a large subhyaline almost transparent spot 

 in the discocubital and discoidal cells ; nervulus postfurcal to intersti- 

 tial, nervellus broken well above the middle ; discocubital vein arcu- 

 ate, stigma lacking. Legs black. Abdomen black, with a cyaneous re- 

 flection, strongly compressed. 



TRANS. AM. ENT. SOC, XXXVIII. 



