PSYCHE. 



[Jnn.-Kcl.. .SS3. 



hotli ends ; the apex is usually truucated 

 (tig. I. c). The basal part forms a 

 slight neck just above the point of inser- 

 tion (fig. I, e). These hairs are but 

 slightly curved, but are so inseited as to 

 lie nearlv Hat on the surface of the insect. 

 The hairs (tig. i. g) tVom the anten- 

 nae are the smallest of the white hairs 

 on C. dorsalis. They are only about 

 0.07 mm. long antl scarcely o.oi mm. 

 in diameter near the base, from which 

 they taper to their acute tip. The long- 

 est hairs arc those from the labial palpi, 

 of whicii the second joint onlv is denselv 

 hairv. These hairs are from 0.30 to 

 0.30 mm. long, and about 0.015 nun. in 

 diameter near their base, from which 

 thev taper gradually to a fine, acute 

 apex. They are consideralilv curved 

 and slenderly filiform. 



Between and u[)oii the hairs of this 

 beetle are vellow. amorplious masses, 

 quite transparent, and apparentlv secre- 

 ted from thesnrt'ace of the insect, altho 

 thev mav be remnants of some matrix in 

 which the hairs are packed during the 

 pupal state of the insect. Fischer men- 

 tions substances of apparently similar 

 nature in his dissertation, '■' and Ilagen,"''' 

 in 1883, further discusses them.- These 

 masses on C dorsalis oix&n take beauti- 

 fullv clear impressions of the hairg 

 themselves, and are insokdile in water, 

 alcohol, turpentin. glvcerin or chloro- 

 form. 



With the exception of the elytra, lab- 

 rum and parts of the mandibles, all 



^ Hagen, H. A. On tlie color and llio 

 pattern of insects. (Proc. Amer. acad. arts 

 and sciences. 1S8;, v. 17. p. J34-267.) 



white portions of C. dorsalis owe their 

 creamy whiteness to the hairs tlescribetl 

 above ; these hairs are set on shining, 

 cupreous or green-bronze surfaces. 



The hairs upon the sides of the thorax 

 of C. vulgaris and C. piiritaua ;ire 

 similar in structure and general form to 

 hairs from the same region in ( . dor- 

 salis. but thev are smaller in C. fiitritana 

 (o.kS nun. long bv o.oi mm. in diam- 

 eter) and slimmer in C. vulgaris (0.55 

 mm. long and about o.oi mm. in diam- 

 eter) ; in the latter sjiecies the\ are not 

 so abundant. 



Taking the families of cideoptera in 

 their svstematic ortier. I examined next 

 the scales of 



.\XTHR]:XU.S SCROPini, Mil \K. 



The figuration of the whole bodv and 

 even of the legs of this insect is due to 

 scales which are not imbricated as are 



Fij;. 2. Scales o{ Anthreiius: a. of A. scrophittariae: 

 b, arrangement of same on portion of an elytron ; r, 

 scales of .14. T'a/-/«*\ Kniargeinent : o antl r, too (liain., 



by 50 itiaiii. 



the scales of lepidoptera. The basal 

 eiul of each scale is inserted in a cavit\ 

 which is at tiie bottom of a tunnel- 

 shaped deepening of the cliitinous .sur- 

 face of the insect, and the scales are 

 arranged to a certain extent, altho rather 

 irregularly, in lines. Fig. z. b shows 



