HYDROPHILID^E. — HYDROBIUS. 133 



" Bottisham."— Rev. L. Jenyns. « Southend." — Rev. F. W. 

 Hope. 



Sp. 16. striatulus. Ater, thoracis margine elytrisque substriatis griseis. (Long. 



corp. li— If lin.) 

 Hy. striatulus. Fabricius. — Steph. Catal. p. 61. No. 617. 



Larger than the foregoing, the striae and punctures less profound, the elytra less 

 clouded with dusky, &c. ; nevertheless it may be merely a variety : the head 

 is black, with a very minute pale spot on each side : the palpi griseous : the 

 thorax black, with a broad griseous margin: the elytra pale griseous, and 

 very obscurely striated : the body obscure black : the legs pale griseous. 



Less common than the last, but found throughout the metropo- 

 litan district. 



Sp. 17. Colon. Niger, thoracis lateribus pallidis, elytris tenue punctato-striatis, 

 fusco-griseis, versus apicem maculis duabus albidis. (Long. corp. 1-^ — 1£ lin.) 

 Hy. Colon mihi. Steph. Catal. p. 61. No. 618. 



Allied to the two last, but of a darker colour, the lateral margins of the thorax 

 narrowly pale, &c. Deep black, finely punctulated ; head with a very minute 

 pale spot on each side ; thorax with a narrower pale-yellowish lateral margin : 

 the disc glossy-black : elytra dusky or brownish-griseous, very finely punctate- 

 striated, the disc more or less clouded with a deeper tinge, and near the suture 

 towards the apex two round whitish spots : the lateral margins, and sometimes 

 the base, pale : legs pale griseous. 



Sometimes found near London, but more abundant in the New 

 Forest, Hants. " Bottisham." — Rev. L. Jenyns. 



Sp. 18. bipustulatus. Niger, capite antice maculis duabus Julvis, elytris tes- 



taceis nigro pulverulentis, stria suturali unicd. (Long. corp. 1^ — 1^ lin.) 

 Hy. bipustulatus. Mar sham. — Steph. Catal. p. 61. No. 619. 



Glossy-black : head with two fulvous spots before the eyes : thorax testaceous, 

 with three more or less confluent dusky spots on the disc, the lateral margins 

 pale yellowish: elytra testaceous, obsoletely marked with interrupted black 

 lines, each with a single impressed stria towards the suture : abdomen black : 

 legs pale rufous. 



The clouded thorax and pale hue, added to the small size of the insect, dis- 

 tinguish this from the following. 



Far from uncommon near London, especially during the early- 

 part of the year : also found in Norfolk. " Common in the spring, 

 near Andover." — Rev. G. T. Rudd. " Bottisham."— Rev. L. 

 Jenyns. 



Sp. 19. minutus. Suhovatus, piceus nitidus, elytrorum thoracisque lateribus pal- 

 lidis, pedibus nigro-piceis. (Long. corp. 1^ — 1^ lin.) 

 Hy. minutus. Mar sham. — Steph. Catal p. 61. No. 620. 



