HENRY J. FRANKLIN. 217 



face, as a whole, is thickly and coarsely punctate and densely 

 pilose. A little behind the center, however, there is a less 

 punctate area, a small part of it usually being entirely smooth. 

 As the hairs, which form the pile, arise from the punctures, 

 this smoother area is usually more or less naked. From this 

 area a single fine median stria runs forward to the anterior 

 margin. Somewhat less than half the way from the side 

 margin to the middle line and about midway between the 

 front and hind margins, on each side, is a short groove or 

 stria. These lateral striae are known as the parapsidal 

 grooves. The pile on the hind part of the scutum, between 

 the bases of the wings, is often of a strikingly different color 

 from that on the front part and on the scutellum, so that it 

 forms a very noticeable transverse band. This band is, in 

 this paper, called the " hiter-alar bandy 



The scutellum lies behind the scutum and is separated 

 from it by a very distinct suture. It is less than half as large 

 as the scutum. It overhangs the middle of the metanotum be- 

 hind. It has two small latero-anterior areas, which are parti- 

 ally separated from the median area by sutures. It is lunate 

 in form, both the front and the hind margins being curved 

 backwards. Most of its surface is densely punctate, but it 

 is much less so on the medio-anterior portion and on a me- 

 dian line running backward nearly to the hind margin. Ex- 

 cept on this less punctate portion, it is densely pilose. If 

 the mesonotum is separated from the rest of the thorax, a 

 large posterior internal part is found attached by two lateral 

 arms to the scutellum. This structure does not show on the 

 surface at all. As Mr. R. E. Snodgrass, in his splendid 

 work on the anatomy of the honey bee (Technical Series, 

 No. 18, U. S. Department of Agriculure, 1910, p. 55) has 

 shown, it is the representative of the post-scutellum and its 

 phragma. 



The mesopleura are very large and make up most of the 

 sides of the thorax. Below, they are completely fused with 

 the mesosternum, with no suture to indicate the limits of the 

 latter. Above, they reach the bases of the wings. Each 

 mesopleuron is made up of a small double upper plate, known 



TRANS. AM. ENT. SOC, XXXVIII. (28) 



