MUSCTNA GROUP. 27 



Near Musclna. 

 (Pla(e n, fiss. 23-2(;.) 



Body slender, especially so in the anterior part ; sejgjments 3, 4, and 5 

 with a ridge around near tip, and faintly spinidate. Beo;inninw witli 

 the fifth segment the ventral area is swollen, and with two bands of 

 spinules. At the ventral base of the last segment there is a row of 

 seven rounded tubercles, all nearly smooth, the median smaller tlian 

 the others; the middle one of each side is at the end of $ curved, 

 swollen area which extends under the submedian tubercle. The ti|) 

 of body is truncate, and with four tubercles on the upper edge and 

 four below; those above are rather })rominent, but those below are 

 small, and the outer ones scarcely visi})le. The stigmal plates are 

 elevated, and each has three straight slits, directed toward tliose of 

 the opposite plate; the button is distinct. The anterior, spiracles 

 have six long lobes. The head, seen from above, shows a truncate 

 lobe each side. 



This has been sent in two cases as passed in feces, both localities 

 in the South. 



Muscid .1. 



(Plate II, figs. :W, 37, ;iS.) 



Head from above bilobed; two closely approximate mandibles; 

 anterior spiracles short, with four lobes. Segments generally smooth ; 

 beginning with the fifth each has a transverse line on middle of 

 venter; beginning with the sixth each lias a basal, transverse, fusi- 

 form, spinulose area on the venter; on the penultimate segment 

 there is one at tip, and on last segment one at base surrounding the 

 anal area, which is not prominent, but shows two smooth brown 

 areas on the middle, and each side a small tubercle. The foiu'th 

 segment shows above and on sides a raised line near the posterior 

 edge, also a finer line on basal part of last segment; the segments at 

 their juncture are usually contracted. The last segment is rather 

 flat on top, but evenly rounded below, and without tubercles; the 

 stigmal plates elevated, scarcely one-half tlieir diameter apart, each 

 with a button and three short straight slits j)<)inting toward those of 

 the opposite })late. 



Sent in from the South as ])asse(l in feces. 



Muscid C. 



(Plate II, fl^^s. 20-32.) 



The bilobed head has a papilla each side; two separate great 

 hooks; the anterior spiracles are semicircular and with many (about 

 20) lobes; segment 5 and those beyond have each a swollen, fusiform 

 area on the ventral base, each with transverse ridges; lateral fusi- 



