70 Mr. C. J. Gahan's additions to the 



This species somewhat closely resembles C. nivco- 

 signata, Thoms,, but may be at once clistingiiished by the 

 position of the basal white spots of the elytra. These 

 are placed at the extreme base in the former, while in 

 the latter they are a short distance from the basal 

 margin. 



In addition to the usual difference in the length of the 

 antennffi, and the shape of the abdomen, the males of 

 the present species differ from the females by the thicker 

 pubescence on the front of the head, which may be 

 greyish or even whitish in colour, and by having the 

 lateral spot on the first abdominal segment equal to or 

 larger than the spot on tbe second segment. In the 

 female the first spot is much smaller than the second. 

 In the females also the femora are more or less black, 

 while in the males they are pale testaceous. 



Malacoscylus Jiumilis, Bates. 

 Biologia C. A., CoL, vol. v., p. 2'23. 



One male specimen only was known to Mr. Bates 

 when he wrote his description. Mr. H. H. Smith has 

 since sent a long series, including both male and female 

 examples, frona the following localities in Guerrero : — 

 Omilteme (8000 ft.), Xucumanatlan (7000 ft.), and Chil- 

 pancingo (4600 ft.). 



The female differs from the male by its somewhat 

 shorter and relatively broader form ; by its shorter, 

 thicker, and more densely fringed third antennal joint ; 

 the front of the head also is black and gloss}', excepting 

 a slight patch of greyish or fulvous pubescence on each 

 side beneath the antennal tubercle ; the lateral fulvous 

 vittffi of the prothorax only exceptionally extend on to 

 the humeral depression at the base of the elytra in the 

 female, while they very generally do so in the male ; the 

 tarsi of the females are entirely black, while in the 

 males the first three joints of the anterior tarsi are 

 more or less yellowish. In some examples of both 

 sexes the fulvous vittiB of the prothorax have extended 

 dorsally so as to cover part of the anterior half of the 

 disk ; while in one small male almost the whole upper 

 suiface of the head and prothorax is covered with ful- 

 vous pubescence. These examples differ in no other 

 respect from the typical form, with which they are, in 



