POLYGLYPTA. 128 
Hab. Mexico 158 (Sallé), Jalisco, Atoyac in Vera Cruz (Schumann); GuaTEMALa 9 
(Sallé), San Gerénimo and El Jicaro in Vera Paz, El Reposo, Las Mercedes, Cerro 
Zunil, Capetillo (Champion) ; Costa Rica (Van Patten), Volcan de Irazu 6000 to 7000 
feet (Rogers 1°); Panama, Bugaba, Volcan de Chiriqui (Champion).—CotomBta 23 4 87. 
I believe that the synonymy above given is correct, but exception may be taken to 
the inclusion of P. dogotensis under P. costata: Stal separates the two insects on the 
formation of the head and forehead and the number of the coste; but the latter 
character is certainly misleading, and with regard to the former, though the head appears 
to be slightly variable in shape, yet it is not sufficiently so to found a species upon, and 
the difference of colour which often appears to occur in some specimens makes it seem 
rather longer or shorter, although, in fact, the difference is only apparent. Moreover, 
in the case of the specimens of P. bogotensis in Signoret’s collection (referred to as 
typical specimens by Fairmaire) the head appears shorter and less angled than in those 
labelled P. costata and P. nigriventris, whereas, according to Stal, the reverse ought to 
be the case: if there were any males of P. bogotensis extant differing from the males of 
P. costata, the case might be altered, but I have never seen any male of that insect. 
Mr. Butler, indeed (/. ¢. p. 210), quotes both male and female as being in the British 
Museum ; but the four specimens at present placed under the species in the collection 
are all undoubtedly females, and I think are certainly P. costata. 
With regard to P. reflexa it was described by Mr. Butler on a single specimen ; in 
our series there are several examples among the males of P. costata that resemble it 
in the reflexion of the horn, and in one or two specimens there is quite as marked a 
deflexion. Mr. Distant has kindly lent me the type of P. godmani, and it is evident 
that he has inadvertently counted in the external coste of the tegmina, for there are 
only seven coste proper on the pronotum (one dorsal and three on each side), whereas 
he mentions it as having thirteen, and in other respects it agrees with P. pilosa, which 
is now universally considered to be the male of P. costata. 
Var. nigridorsis. (Tab. VIII. figg. 4, 4a.) 
Q. Elongata, testacea, dorso pronoti late nigro, vittis utrinque precipue ad apicem a vitta dorsali usque ad 
marginem extensis, costis pronoti variantibus. 
Elongate, testaceous, with the barb of the pronotum broadly black, and with more or less distinct bands or 
markings proceeding from the central band on each side ; dorsal horn slightly but plainly reflexed. 
Long. 13-15 millim. 
Hab. Mexico, Orizaba (Bilimek, in Mus. Vind. Ces.); Guatemata (Mus. Roy. Belg.), 
San Juan and San Gerénimo in Vera Paz (Champion). 
This is an insect of about the same size as the ordinary run of P. costata, which 
stands in the British Museum collection under P. dorsalis, and in the Belgian 
Museum collection as P. maculata?; and in Signoret’s collection there is a specimen 
placed apart and labelled “ P. costata, det. Signoret.” Iam inclined to think that the 
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