116 



AETICLE VIII.— BKIEF MISCELLANEOUS NOTES. 

 1. Black Locust. 

 {Nematus rohinicB, n. s.)"^ 



(Plate XII. Fig. 5.) 



From a number of saw fly larvae found infesting the black locust 

 (Robinia pseudacacia) at Normal, we bred during the latter part of 

 July a small saw fly related to Nematus bivittatus and aureopectus, 

 but apparently undescribed. 



Body stout, pale brownish yellow; mesothorax with a black vitta 

 upon each side ; metathorax with a transverse black band continuous 

 with the posterior extremities of the mesothoracic stripes ; tergum 

 blackish with the sides and posterior margins of the segments of 

 the general color; prothorax between the ends of the mesothoracic 

 stripes a little darker brown; head slightly darker than the body, 

 with a quadrate black spot upon the occiput, extending forward to 

 include the ocelli. This area is slightly shining, but the adjacent 

 surfaces of the head are dull, punctured, and rather densely pubes- 

 cent. Antennae longer than the head and body, third and fourth 

 joints equal ; clypeus emarginate in front. The under parts and legs 

 are uniform pale yellow brown, except the tibiae and tarsi of the 

 posterior pair which are dusky, and the genital valves of the 

 female, which are black. Wings hyaline, veins fuscous, costa and 

 stigmata yellowish, second submarginal cell slightly angled at the 

 recurrent nervules, of which there are two about equally removed 

 from the two extremities of the cell. First submarginal quadrate, 

 distinct ; posterior margin of wing behind the lanceolate cell slightly 

 tinged with yellowish. 



Length of body 4 mm. ; expanse 10 mm. 



Described from a single female. 



The larva from which this specimen was bred entered the ground 

 July 8, the imago emerging on the 26th. 



2. Onion. — At Champaign, July, 1883, my attention was called 

 by Prof. Burrill, to some hairy larvae that were destroying onions in 

 his gardens, as far as their numbers enabled them. Although this 

 seemed to be the larva of Spilosoma virglnica, Fab., its colors were 

 somewhat unusual, and we bred it for identification ; but the 

 imagos proved to be unquestionably that species. 



