OF NATURAL HISTORY. 747 



[Continuation from Boston Journal of Natural History, vol. 1, May, 1837 

 No. 4, pp. 361 — 416.] 



MERIA Jur. 

 M. COSTATA.— 9 Black; tergum with yellow bands and two 



Inhabits Indiana. 



Body black : head above the antennae with a transverse line, 

 slightly interrupted in the middle, an orbital line, and short line 

 behind the eyes, yellow : mandibles piceous : thorax with two 

 transverse spots before, a small, triangular one above the wing- 

 scale, a transverse one behind the scutel, and a bilobed one each 

 side behind, yellow ; each side of the middle of the thorax are 

 two abbreviated, somewhat oblique, impressed lines : metathorax 

 with a double yellow longitudinal side and obvious transverse 

 rugae : pleurae with a triangular spot under the superior wino-s, 

 a small oblique line over the intermediate feet, yellow : wino-s 

 with a brown costal margin : tergum [362] with a yellow band 

 on the middle or before it, of each segment, excepting the last ; 

 the second band interrupted into two transverse, oval spots : 

 venter with a longitudinal, lateral spot on the second segment 

 and a transverse lateral one on the third, yellow ; tarsi and in- 

 termediate and posterior pairs of tibiae piceous; a yellow spot 

 on the posterior coxae. 



Length half an inch. 



Var a. Middle of the thorax with a small double yellow spot. 



The observations which I had occasion to make relative to the 

 generic affinities of Plesia marfjinata nob., are exactly applica- 

 ble to this species. It agrees precisely with Jurine's character 

 of Plesia, but differs from Mizinc Latr. by having the mandibles 

 entirely d.'stitute of teeth, a character which it has in common 

 with Mcria 111., but the form of its wing-scale, will not admit of 

 its being referred to the latter genus ; I have, however, in this 

 instance, been guided by the characters laid down by Latreille 

 in the R^gne Animale (first Edition). 



2. M. MARQINATA. — Flcsia marfjinata nob., AVestern Quar- 

 terly Reporter. 

 1835.] 



