1893.] NATURAL SCIENCES OF PHILADELPHIA. l' S -"> 



opake; the metathorax finely shagreened, and having at the sides a 

 little cinereous pubescence ; wings hyaline, the nervures testaceous ; 

 the apical joints of the tarsi rufo- testaceous. Abdomen: the three 

 basal segments red, the apical ones black ; thinly covered with cin- 

 ereous pile, the apical segment very smooth and shining." 



"East Florida (St. John's Bluff)." 



Evidently a Taehysphex, and perhaps identical with T. tarsata. 



Larra canescens Sin. ( Tachysphe v? ) 

 Larrada canescens Sin.. 1. <■.. j>. 292. £ . 

 Larra canescens Kohl. 1. c. p. 242. 



" 9 . — Length 5 lines. — Black: thinly covered with short ciner- 

 eous pubescence the abdomen being covered above and beneath ; the 

 head, mesothorax and scutellum strongly punctured ; the metathorax 

 shagreened ; the flagellum much thickened towards the base, which 

 is again more slender; the wings brown, the posterior pair clearer 

 at the base ; the anterior tibiae and tarsi obscure ferruginous. Abdo- 

 men : on apical margins of segments the pubescence is bright and 

 silvery, observable in different lights." 



"Georgia." Also very likely Taehysphex. 



Larra arcuata Sin. {=Ancistromma?) 

 Larrada arcuata Sm., 1. c. p. 293. $? . 

 Larra arcuata Patton, 1. c. p. 389. 



" 9 . — Length 4j lines. — Black ; the face with silvery pubescence; 

 the mesothorax subopake ; the scutellum shining and finely punc- 

 tured ; the metathorax with an arcuate striation, the striation curv- 

 ing forwards, interrupted in the middle by a longitudinal carina 

 which runs to the verge of the truncation, the latter has a small tri- 

 angular shape crossed by coarse arcuate stria?, in the middle of which 

 is a deep fovea ; from the fovea a carina runs downwards to the 

 base ; on each side of the fovea the truncation is smooth, and covered 

 with silvery white pubescence; wings subhyaline, with a faint cloud 

 at their apical margins. Abdomen smooth and shining, with the 

 apical segment rugose." 



"Canada." Seems to closely resemble Taehysphex quebecethiisTrov. , 

 but the rugose apical segment will exclude it from the genus Taehy- 

 sphex. It may an Ancistromma. 



Larra pensylvanica Bve. 



L. pensylvanica Pal.. Bve., Ins. Afr. et Amer. p. 118, Taf. III. f. 8, 1S05. 



"Noir-luisante ; Ailes ternes." 



"Pennsylvanie. " From an examination of the figure of this spe- 

 cies, given by Beauveois I should refer it to Taehysphex. 



