in (I I \\iii,> i\-. — l)^■•ns('In/K. 



414 (1297). CcELAMBLS Ni Bins LcH'.. Pvoc. PhU. Acad. Xnl. Sci., isr).'.. 2'.IS. 



Elongate-oval. Head, thorax, legs and antenme dull yellow ; elytra 

 Willi three or four irregular blackish streaks which sometimes merge It 

 form a fuscous cloud behind the uiiddle; under surface black. Lengtli 

 4.3 mm. 



KnoAvii fi-oiu rndiaiia l)y a single s])e('inien taken near Green- 

 eastle. Pntnam Couiify. by Guy Wilson and presented to the writer. 

 July 9. 



415 (1802). CcELAMBUS iMPRESso-PUNCTATUS Schall., Act. Hal.. I. 1T.S3, 312. 



Oblong-oval. Legs, head and apical half of thorax reddish-brown; ver- 

 tex, base of thorax and elytra dark brown, coarsely and deeply punctate. 

 Many of the punctures elongate, confluent; usually three impressed lines 

 on each elytron, reaching to about the middle. Length 5-5.5 mm. 



Lake, Laporte and ^Farshall <-ountios; scarce. April 28-Au- 

 gust 16. 



Drroiiccfcs cJeprrssiis Fab., dull brownish-yellow, elytra wdth 

 black lines more or less confliuMit. lenuth 4.5 mm., and 1). griseostri- 

 atiis, DeG,. black, densely punctate, the elytra often with narrow 

 greenish stripes or even entirely greenish-black, length 4.5 mm., 

 both range from New York and Canada to IMichigan and westward, 

 and ])erhaps occur in northern Indiana. 



IX. IlvDijopoRrs Clairv. ISOC. fOr., "water [to walk.") 



To tliis g(^nus belong a lai'ge number of small species quite simi- 

 lar in general a))pearance and therefore difficult to distinguish. 

 'Jliey are mostl>' ovate in form, dark brown in color and have the 

 head never margined in fi'onl ; tb(> ]u-osternum never truncate 

 behind; swimming legs fee])l(\ When (^aptured in a water net, they 

 l(^a]) nr spring a few inches at a lime, much in the saine manner as 

 do "cli'-k lieetles. " The Following species bave been 1aken or may 

 occur ill Indiana : 



KKV TO INDIA MA Sl'KCTF.S OF HYDKOPOKIS. 



a. Hind i-u\:il cavities imt cuntiguous. 

 h. Llytra \ arifgalcd in coldr. 



c. riidei' siirlarc bl;iii< or piceous ; form oxai ; length 3.5 nun. 



41(;. CONCINNUS. 

 (■('. I'lKJci- sni-fafc rcddisli-lirdwii ; rorm liroadei', more oliluse in front. 

 iiinrc ;icnlc iiciiiiHJ : icn-lli ■\.~ iiini. i'iii.('iii':u. 



/;//. i;i\ifa nnic(il<irnus. 



'/. I'lidcr Mirface b]aci< ni' piccMius; prostcrnal s|>ine large. 



