THE CANADIAN ENTOMOLOGIST. 201 



outwardly three rows of stout bristles, and on the inner side with a row 

 of smaller ones. Length, 7 mm. Washington. Two specimens from 

 Prof. O. B. Johnson. 



This is the first discovery of the present genus in this country. It is 

 closely related to Mycetophila, differing principally in the course of the 

 auxiliary vein, which terminates in the first, instead of being abbreviated, 

 or of ending in the costa. 



ON THE SUBGLOBULAR SPECIES OF LECANIUM. 



BY T. D. A. COCKERELL, NEW MEXICO AGRICULTURAL EXPERIMENT STATION. 



The genus Kermes of modern authors contains about a dozen 

 subglobular forms, found on oaks, with one exception. These insects 

 might be taken for species oi Lecanium^ but a microscopical examination 

 of their characters, especially in the larva, shows that they are quite 

 distinct from that genus. 



There are, however, four known subglobular species which structur- 

 ally and in the larva resemble Lecaniuvi and not Kermes ; adding to 

 these four others which I have lately received, we have altogether eight 

 subglobular coccid^e which show true Lecaniiim characters. 



Two of these live on conifers, and are placed in a genus separated 

 from Lecanium, known as Physokermes. P. abietis (mod.) = /ie?nicryp/ms, 

 Dalm., = raceviosum, Ratz., = plcece, Schr., inhabits Europe ; P. n. sp. 

 (shortly to be published) lives in Colorado. 



In Europe is also found Lecaniiim emerici, Planchon, on Querais 

 ilex and Q_- cocci/era. This I have never seen, but Signoret gives its 

 characters in some detail. The dermis is tessellate, as in Physokermes. 



From Montevideo comes a very large species, Z. verrucosum, 

 Signoret, and below I describe three from Brazil. 



Finally, in Australia is L. baccatum, Maskell. None of these last 

 five have the dermis tessellate. 



Summing up, we thus have: (i) A distinct genus of two species, — 

 one Palsearctic, one Nearctic, — confined to conifers. (2) A single 

 Palcearctic species, on oaks. (3) Four Neotropical species; and (4) One 

 Australian. 



It seems probable that these insects represent old types, not late 

 developments frorn normal Lecanium. But L, emerici and Physokermes 



