228 AN INTR01 >K 



fully grown this larva m to 10 mm. (0.3 to 0.4 in.) in 



\\\. It then >pins a cocoon, a: ;>upa within the 



skir. r the larval skin is :ul, final: 



being in the cocoon about a month, the pupa becomes active. 



and tlu a time, and then 



cha: l he adult state. 



Family in.- PANORPID 



Order V me authors. 



rpion-jUt 



Th: :nall family; but it is composed of very remarkable 



insects. The most striking character common to all 

 is presented by the mouth. This is prolonged into 

 Aft^ , a rostrum, as shown in the figure. The body is 

 >^ cylindrical or conical; the head is exsertcd ; the 



\^ prothorax is small; and the tarsi are five-jointed. 



is known the members of this family 

 are carnivorous. There are only four described 

 genera. These can be separated by the following 

 table : 



FlG. : 



and tail < : 



norfa. A. Wingless or with rudi mentary wings. B" 



A A. With well-developed wings. 

 ;ro\v ; antenna; setaceous. 

 C. Tarsi with two serrated claws. 



CC. Tarsi with a single simple claw. \\\ \ \ 



BB. Win-- broad ; anteniuu short, thick, the apex narrowed. Mi 



. Among the few insects that occur on the snow, in the 

 winter, in our Northern States, are two species of the genus In>rcus. 

 In this genus the wings of the female are very rudimentary; tl. 

 of t -out half as long as the abdomen, narrow, stiff, 



and entire!} for flight. nirorifiuiins, the Snow-birn 



Bor hining black or brownish black, with the rudimentary 



wings, thorax above, and the rostrum and ovipositor excepting their 



. tawny. The male m<-,t mm. (o. 12 in.) in length; tin 



male, including the OV1] .\\ mm. (0.16 in.). The Midwinter 



Bore us. A', finniitilis. is smaller; the male measuring 2\ mm. 10.1 in.), 



I the female 3 mm. (o. 1 2 in.), in length. This p black- 



* Pannrpiii.-c, Panorpa: / all; Ju-p( = ha . a sickle. 



optcra, incorrectly written Mccaftcru: m?a>s (>u'/K<>^). length ; /(, ><i (TTT- 

 wing. 



