( xlix ) 



" This sub-species, now received for tlie first time from 

 Colombia, differs from the two other sub-species, cacica from 

 Peru and eusehes from the Amazons, in having a complete 

 row of twelve white submarginal spots on each side of the 

 upper surface, six on each wing, instead of from three to five 

 on each front wing only. It has also a very small white spot 

 beyond the cell on the front wing, and the small white 

 crescents between each nervure on the margins are more 

 distinct. On the under side the ground colour is lighter, 

 making all the markings stand out more distinctly. Locality 

 Kio GuATiQUiA, April 1917." 



An aberrant Wasp. — Dr. Chapman exhibited an aberrant 

 specimen of a wasp {Vespa gernianica), and made the following 

 observations : — 



" Wasps rarely come into my sanctum, but on Oct. 6th 

 one came and seemed very interested in some preparation I 

 was working at, so that I easily noticed that there was some- 

 thing unusual about some abdominal segments. The insect 

 is the one exhibited. The second abdominal segment (count- 

 ing in the usual incorrect manner) is wanting in the middle 

 dorsal line, and the two sides nearly meet each other, tapering 

 from a nearly normal width laterally to almost a point where 

 they are opposed, and where continuity is maintained by 

 membrane ; the markings on the two sides are not symmetrical. 



" The first (basal, really 2nd abdominal) segment is pro- 

 duced mid-dorsally at its hinder margin, so as to form an 

 angular projection, largely compensating for the defect of 

 the following segment. 



Sketch of teratological specimen of Vespa germanica 5 , X about 4. 



" I add a rough outline of the aberrant portion of the 

 specimen. How did such a defect come about ? It might 

 be the result of an injury at a late larval stage, but it is very 



PROC. ENT. SOC. LOND., II-IV. 1917 D 



