« 
1875.] MR. G. B. SOWERBY ON NEW SPECIES OF SHELLS. 12% 
or 
I sent the three specimens which I collected on that day to my 
friend M. Sallé, who wrote to me immediately that they were very 
fine insects, and very rare in collections: In consequence of this 
information I went again to Tepanzacualco in May 1860, but could 
find only two more specimens. 
In July of the same year I was on my way to the Atlantic coast for 
change of air (being very ill of pleurisy), when I saw one of these 
insects near Talea, not far away from Tepanzacualco. I could not 
resist the temptation to search for them, and was so fortunate as 
to collect about twelve. Atthe same time I found also several speci- 
mens of a new Golofa, described some time after by Mr. James 
Thomson as Golufa imperator. 
P. victorina is more easily found than the other species from its 
more conspicuous appearance, the difference in colour between its 
head and thorax and its elytra being very striking. 
List of the Species. 
1. Plusiotis resplendens, p. 119. 9. Plusiotis lacordairei, p. 122. 
2. aurora, p. 119. 10. auripes, p. 122. 
3. batesi, p. 119. KL. psittacina, p. 123. 
4. —— chrysargyrea, p. 120. 12. costata, p. 123. 
5. —— marginata, p. 120. 13. ——-sallai, p. 123. 
6. adelaida, p. 121. 14. —— laniventris, p. 124. 
7. —— lata, p. 12). 15. —— mnizechii, p. 124. 
8. gloriosa, p. 121. 16. —— victorina, p. 124. 
EXPLANATION OF PLATE XXIII. 
Fig. 1. Mandible of Pelidnota. Fig. 5. Plusiotis resplendens, p. 119. 
2. Mandible of Pluszotis. 6. batesi, p. 119. 
3. Plusiotis sallei, p. 125. : is aurora, p. 119. 
4. lacordaireti, p. 122. 
4. Descriptions of ten new Species of Shells. 
By G. B. Sowrrsy, Jun. 
{Received February 25, 1875.] 
(Plate XXIV.) 
1, Conus GRAcILts, n. sp. (Plate XXIV. fig. 6.) 
C. testa elongata, basin versus multo attenuata, superne suban- 
gulata, fusca, maculis albidis irregulariter aspersa, undique 
transversim sulcata, sulcis angustis, subdistantibus, crenulatis ; 
spira elata, subgradata, acutiuscula ; apice papillari; anfracti- 
bus 9, superne concavis, crenato-bisulcatis ; apertura angusta. 
Long. 31, maj. diam. 10, min. 2 mill. ; spira alt. 8 mill.; apert. 
long. 23, maj. lat. 2, min. 13 mill. 
An elongated Cone, much attenuated towards the base, obtusely 
