NOTES ON AQUATIC KHYNCHOTA. 3 



kindly lent me an imago and a larva of this species from 

 Arizona, U.S.A. It has been seldom recorded, and seems scarce. 

 Mayr (1863, Verh. z-b. Ges. Wien, xiii. pp. 347-51) gives a long 

 description, with figures (pi. xi. f. 1-4), recording it from Cali- 

 fornia and Mexico. In 1871, in the same journal (vol. xxi. 

 p. 405), he- mentions that the latter locality was a mistake. 

 Prof. Uhler (1894, Proc. Cal. Ac. Sci. (2), iv. p. 292) records it 

 from Lower California, but it does not appear to have been 

 independently mentioned elsewhere. The maximum breadth of 

 Prof. Baker's specimen exceeds that of the type (sec. descr.) by 

 2*5 mm. ; the breadth of the base of the pronotum is 13 mm. 

 None of the preparatory stages appear to have been known either 

 to Mayr or other writers. The above-mentioned larva is in the 

 ultimate stage and, as one would expect, differs very little from 

 the imago beyond the customary shorter pronotum, absence of 

 hemielytra, &c. The two large deep pronotal variolations are 

 more pronounced, and the base of the pronotum is straighter in 

 the larva. The " metasternal episternites " (Joanny Martin, 

 Bull. Mus. Paris, Aug. 1896, p. 1 [sep.] ) are present, and are of 

 great size. Bhynchotists will await with great interest the results 

 of M. Martin's researches upon these remarkable appendages. 

 This species should serve as the type of Mayr's genus. 



Fam. Corixid^. 



1. Corixa holda, n. n. for Corixa fasciolata, Heer, 1853, 

 Insektenf. tertiarg. Oening. iii. 86 (nee Muls. Rey, 1852). 



2. Corixa hieroglyphica, Duf. This species has a very wide 

 distribution, practically the whole of the Pakearctic Ptegion, 

 (including the Canary Isles), Yarkand, North America, &c, and 

 Mr. Malcolm Burr has lately given me specimens ( ? ? ) from 

 Assam (Chenapungi, Khasia Hills). 



3. Micronecta, Kirk. In the last volume (p. 240) of the 

 ' Entomologist,' I referred Corixa albifrons, Motsch., to the genus 

 Sigara, stating that I did not know the species. Dr. Horvath 

 has since kindly sent me two fine specimens from Ceylon, which 

 he has determined as the above species, and which fully accord 

 with the original description. On making fresh investigations, 

 it appears that the examples are also, undoubtedly Sigara siva, 

 Kirk. (Dr. Horvath has expressed his entire concurrence in this 

 opinion), and I believe further that Micronecta ovivora (Westw.) 

 is merely a bleached example of the same. The name "striata, 

 Fieb.," which became dormant (Ent. 1897, p. 240) in Sigara is, 

 as Dr. Horvath has pointed out, available for Micronecta, and 

 the species will now be known as Micronecta striata (Fieb.). 



It will be useful to briefly recapitulate the synonymy : — 

 Sigara striata, Fieb. (nee Fabr.). 

 Corixa albifrons, Motsch. 

 Corixa ovivora, Westw. 



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