404 



PROCEEDINGS OF THE NATIONAL MUSEUM, 



VOL. 41. 



Fig. 12.— The stigimal vena- 

 tion AND SHEATH OF PSEU- 

 DOSIOBLA EXCAVATA (NOR- 

 TON). 



PSEUDOSIOBLA EXCAVATA (Norton). 



A homotype (det. Rohwer) of this species came from Lake Forest, 



Illinois, and is labeled "button bush." It is no doubt one of the lot 



collected by Doctor Needham.^ Specimens of 



this species are also from Canada, and Long 



Island. The figure is of the homotype. 



PSEUDOSIOBLA CEPHALANTHI, new species. 



Unknown larva 5 c Dyar, Can. Ent., vol. 27, 1895, p. 



339. 

 Siobla excavata Dyar, Journ. New York Ent. Soc, 



vol. 5, 1897, p. 190. 

 Pseudosiobla excavata Howard, Insect Book, 1904, pi. 



13, fig. 7. 



Female. — Length 10 mm. Clypeus with a 

 slight median arcuation; antennal furrows com- 

 plete but not strong; antennal fovese poorly 

 defined; postocellar line slightly shorter than 

 the ocelloccipital line and much shorter than the 

 oceUocular; head nearly uniformly, coarsely 

 punctured; third antennal joint subequal with the fourth and fifth; 

 propodeum granular; second and third dorsal segments aciculato- 

 granular, the following very finely gran- 

 ular; hind basitarsis curved. Black; 

 clypeus, labrum, posterior margin of pro- 

 notum, spot or side of pronotum, spot on 

 tegulse, propodeum, trochanters, basal 

 two-thirds of four hind tibiae whitish; 

 two basal joints of antennas, anterior 

 tibiae and tarsi yellow ; apex of four pos- 

 terior tibite and their tarsi, and second 

 dorsal segment rufous; dorsal abdomi- 

 nal segments piceous ; wings dusky hya- 

 line, venation dark brown (black basally) 

 base of stigma yellow. 



Male. — Length 10 mm. Similar to 

 female. Abdomen not piceous; third antennal joint distinctly shorter 

 than the fourth and fifth; hypopygidium sharply rounded apically. 



Near New York City, New York. Three females and seven males 

 bred from larvae on CepTialantlius occidentalis (button bush) by 

 H. G. Dyar and described as Siobla excavata.^ 

 Type.— Csit. No. 13966, U.S.N.M. 



1 Psyche, vol. 10, 1903, p. 27. a Journ. New York Ent. Soc, vol. 5, 1897, p. 190. 



Fig. 13.— The stigimal venation and 

 SHEATH OP Pseudosiobla cepha- 



LANTHI ROHWEK. 



