REPORT OF DIRECTOR AND STATE GEOLOGIST 1900 



r211 



by Say is made identical with the European species A r m a - 

 dillidium vulgare and its distribution is said to be 

 world-wide. 



In one of the Schenectady greenhouses there occurs in abun- 

 dance a species of the genus A r m a d i 1 1 i d i u m which is 

 markedly distinct from the species above mentioned. It is also 

 distinct from any of the 23 other species of this genus described 

 in the work of Budde-Lund as found in Europe or elsewhere in 

 the old world. The circumstances are such as to suggest that 

 it is probably introduced in this locality but is an indigenous 

 American species. 



Armadillidium quadrifrons (new species) 



Body oblong, oval, strongly convex. Length 9 mm; width 

 4-5 mm. Surface minutely dotted. Color light brown with two 

 longitudinal rows of dark brown spots on each side. 



Head more than three times as broad as long. Frontal 

 lobe (clypeus) prominent and sub- 

 rectangular when looked at from 

 above. Lateral lobes (not shown 

 in the figure) large and inclined? 

 downward and outward. Anterior 

 margin of the head slightly notched 

 in the middle. Eyes small and 

 situated at the anterior lateral 

 margin of the head. 



Antennae about one third length 

 of body. First joint short and 

 rounded; second joint about a third 

 longer than broad; third, fourth 

 and fifth joints successively longer. 

 Of the two joints of the flabellum 

 the terminal one is slightly the 

 longer. Antennules rudimentary. 



The first thoracic segment the 

 longest and its epimera broad, the 



anterior extensions embracing the pig2 Armadmidium quadrifrons xs 

 head at the sides. The remaining six thoracic segments about 

 equal in length. The anterior lateral angles of the second, third 

 and fourth segments truncate. 



