THE CANADIAN ENTOMOLOGIST. 



IDIASTA FORSTER. 



(10) Idiasta inacrocera n. sp. 



^ . — Length 3? mm. Black, highly polished, the second abdominal 

 segment with a rufous stain. Antennae 40-jointed, nearly twice as long as 

 the body, brown, the scape and 2nd joint red, the 4th about one-third 

 longer than the 3rd. Palpi pale ; mandibles and legs red. Thorax with 

 the parapsidal grooves indicated only anteriorly by short, punctate lines, 

 a grooved line on the shoulders and a fovea just in front of the scutellum. 

 The scutellum has at base two large fovese separated by a slight carina. 

 Mesopleurse smooth, with a broad punctate space between them and the 

 mesopectus. Metathorax coarsely rugose. Abdomen ovate, and except- 

 ing the petiole, which is longitudinally striated, smooth and polished. 

 Wings hyaline, the stigma very large, ovate, brown, the veins paler. 



Described from one specimen. 



APHIDIUS NEES. 



(11) Aphidius macrogaster. n. sp. 



$. — Length 3^ mm. Head, thorax and legs rufous; the anterior 

 legs slightly yellowish. The abdomen is very long, lanceolate, slightly 

 more than twice the length of the head and thorax combined, terminating 

 in a small curved prong. Antennae 20-jointed, brown, the joints of the 

 flagellum about twice as long as thick. The mesonotum exhibits some 

 fine longitudinal aciculations just in front of the scutellum and the parap- 

 sidal grooves are present, otherwise it is smooth and shining. Wings 

 hyaline, the venation brown ; the 2nd branch of the radius is about as 

 long as the transverse cubital nervure. 



Described from one specimen. 



The species approaches nearest to A. bicolor Ashm.; but that species 

 is larger, the head black, and the sculpture of the mesonotum is different. 



(12) Aphidius crassicornis n. sp. 



^. — Length 25 mm. Black polished; clypeus piceous ; mandibles, 

 palpi, two basal antennal joints and legs, yellow, the middle and posterior 

 tibiae and tarsi sightly obfuscated. Antennas 21-jointed, stouter than 

 usual and remarkable for the shortness of the flagellar joints, which are 

 hardly longer than wide and readily separate the species from all other 

 described forms. The abdomen, except a rufous tinge on the 2nd seg- 



