210 BULLETIN: MUSEUM OF COMPARATIVE ZOOLOGY. 
MECISTOCEPHALUS PUNCTIFRONS Newport. 
Proc. Zool. soc. London, 1842, p. 179; Trans. Linn. soe. London, 1844, 19, 
p. 429; Meinert, Naturh. tiddskr., 1870, ser. 3, 7, p. 97; Chamberlin, Ent. 
news, 1913, p. 122. 
Mecistocephalus guildingi Newport, Loe. cit., p. 429; Meinert, Loe. cit., p. 96; 
Latzel, Mitt. Mus. Hamburg, 1895, 12, p. 101; Pocock, Trans. Linn. 
soc. London, 1893, 24, p. 470; Attems, Zool. jahrb. Syst., 1903, 18, p. 209. 
Mecistocephalus sulcicollis Témésvary, Termes, fiizetek, 1885, 5, p. 64. 
Lamnonyx punctifrons Attems, Loe. cit., p. 211. 
Locality.— State of Amazonas: Mand4os! (Mann and Baker). 
This appears to be the first record of the occurrence of a member of 
the Mecistocephalidae in Brazil. The species is common in the 
Bermudas and West Indies. It must logically be regarded as the 
type of Mecistocephalus proper, the other species originally included 
under this name by Newport having been removed to other genera. 
It would seem that Newport did not at the time he erected the genus, 
know or have in hand any species congeneric with carniolensis and that 
in consequence there appears no justifiable way of continuing the 
prevalent practice of applying the name Mecistocephalus to the 
genus including these species. 
As no difference of distinctive value has been pointed out between 
punctifrons and guildingii and as different authors refer to American 
specimens at times under one and at other times under the other 
name, I have united the two as one species as was long ago suggested 
by Meinert. If the form occurring in the western hemisphere shall be 
found to differ definibly from that of the eastern hemisphere, it must 
bear the name guildingii. 
TYGARRUP, gen. nov. 
Body widest near middle, attenuated moderately cephalad and 
more strongly caudad. 
Head large. Cephalic plate longer than wide, narrowed caudad. 
Frontal suture present. 
Antennae long, filiform. 
Clypeus proper large, triangularly extending forward in middle 
to between antennae, at middle being three times greatest length of 
labrum; clothed with few hairs. 
Labrum tripartite, the median piece narrow and caudally one- 
