1892.] ENTOMOLOGICAL NEWS. 167 



to be split diagonally by an abnormal suture running from the 

 left anterior corner to the right posterior one; a blind suture on 

 the right side occupies nearly the place of the normal one between 

 the first and second segments, while a similar suture on the left 

 side occupies the position of the normal one between the second 

 and third segments; these two sutures reach only to the median 

 line and there disappear; the anal segment is quite normal in 

 form, but is somewhat inclined toward the right, as the posterior 

 margin of what should normally constitute the third segment is a 

 little oblique to the median line and is inclined anteriorly on the 

 right. There is no special abnormal feature in the disposition of 

 the macrochaet^e, except that the normal median marginal pair 

 of the second segment is obsolete and that of the first segment 

 nearly so. The ventral portion does not share the deformity to 

 such a degree as the dorsal. This specimen shows an inclination 

 toward either an absorption of one abdominal segment, or the 

 acquisition of a fifth one. 



Eiistomatodexia insiileiisis Twns. ms. — A S , from Jamaica (C. 

 W. Johnson), May, shows the following peculiarities: The first 

 segment is lengthened by one-fourth on the right half, where it 

 joins the right side of the third segment, its posterior suture 

 being sinuate; only the left half of the second segment is present, 

 e.xtending to and including the median line, its anterior and pos- 

 terior sutures uniting in a curve on the median line; the right 

 side of the third segment is lengthened by one-third, which still 

 leaves the right side of the abdomen somewhat shortened or 

 drawn up, on account of the absence of the second segment on 

 that side; the fourth or anal segment is normal. The venter 

 agrees with the dorsum; the macroch^tae on hind margins of last 

 two segments are normal; the normal lateral marginal one on each 

 side of first segment is present; the lateral marginal pair of the 

 second segment is present only on the left side, while the normal 

 median marginal pair is represented by a single macrochaeta. 



The last mentioned individual is a dexiid. In all of these spe- 

 cies the normal number of abdominal segments is four. I have 

 referred to the antero-posterior diameter of the segments as the 

 length, although it is the lesser diameter. 



In all probability the deformities above described were due to 

 injuries received in the larval, not in the pupal state. 



